The guesthouse stock inside the heritage zone is genuinely good for the money: family-run, whitewashed, wooden-shuttered, often with a shaded terrace out front. Expect to pay roughly fifteen to thirty US dollars a night at the time of writing, with fan-only rooms at the bottom of that and air-conditioning, hot water and a baguette-and-eggs breakfast towards the top. Names at this end turn over and rebrand constantly, so the useful instruction is a search area rather than a shortlist.
Two areas are worth the search. The first is the lane grid between Sisavangvong and the Mekong, around Ban Xieng Mouane, the quarter that holds Wat Xieng Muan and the restored Heuan Chan heritage house. You are two to five minutes' walk from the museum, the market and the river, on quiet residential alleys where the loudest thing after about nine in the evening is a motorbike being wheeled indoors. The second is the run of ordinary streets beyond the neck of the peninsula, heading south-west towards Phosy Market. Rooms there are cheaper again, and the streets are ordinary Lao streets rather than a heritage stage set: noodle stalls, hardware shops, school runs. The trade is distance. From the market end to the tip of the peninsula is a good half-hour on foot, which is fine once and tiresome four times a day, so budget for a bicycle. Guesthouses in either area often lend them free or for a token sum, though confirm that when you book rather than assuming.
Two specific cautions. The lanes are unlit and the paving is uneven, with open drainage channels at the edges; carry a torch or use your phone, and do not assume a flat pavement. And the cool season has more bite than people expect. December and January nights in this valley typically settle at around fifteen degrees, sometimes a little lower, which is nothing in the abstract and quite a lot in an unheated timber room. Many air-conditioning units here cool only, so ask whether yours heats at all, and ask for extra blankets when you check in rather than at midnight. Visitors arriving from Bangkok routinely pack nothing warm.
The far bank
Across the Mekong, the Chomphet side and the village of Ban Xieng Maen are rural, agricultural and quiet, with a small number of places to sleep. The public ferry goes from the landing below the Royal Palace Museum, costs a few thousand kip or so, and generally leaves when it fills rather than to a timetable. This is a lovely choice for a second visit and a poor one for a first: evening crossings thin out, you may end up chartering a boat back in the dark, and you should not count on finding a cash machine on that side. Draw kip before you cross.
This is where most people should stay. Expect roughly sixty to a hundred and fifty US dollars a night for a heritage room with a courtyard, decent bedding and staff who will organise a tuk-tuk without a fuss.
The real decision here is which river. The Mekong bank has the width, the cargo boats and the sunsets, but Khem Khong is busier, the bank drops steeply, and a ground-floor "river view" is frequently a view of a bamboo fence with water somewhere beyond it. The Nam Khan side is narrower, greener and noticeably quieter, gets the morning light, and is where the seasonal bamboo footbridge lands. That bridge, occasionally joined by a second in a given year, is rebuilt by hand each dry season and washed out by the monsoon; there is a small toll, expect a few thousand kip, and it is generally in place from around November to May.
Be clear about what it gets you, because this is oversold. The bridge lands you in Ban Phan Luang, a residential village with a handful of riverside restaurants and gardens: a pleasant twenty-minute wander, not a craft tour. The saa-paper and weaving villages people mean, Ban Xang Khong and Ban Phanom among them, are a few kilometres further and are reached by road or tuk-tuk rather than by stepping off the bridge. The other cost of the Nam Khan side is mosquitoes at dusk; dengue is present in Laos, so use repellent rather than trusting the season.
One honest caveat about that recommendation. The Nam Khan bank is mostly small, family-run guesthouses without brand recognition, so you find it by drawing a box on the map between Sakkaline and Kingkitsarath and reading the pins, not by searching a hotel name. The town's recognisable heritage conversions sit on the spine or on the Mekong side. Villa Santi, on Sakkaline, is the long-standing example, with the alms round passing along the road outside; the building's history is told several different ways locally, so treat the version you get at check-in as folklore rather than record. At the tip, Mekong Riverview sits a couple of minutes from Wat Xieng Thong with balconies over the water. Just beyond the neck, in the Ban That Luang quarter near Wat That Luang, Villa Maly occupies structures dating from the late 1930s that were once in royal hands, with a proper pool and garden and about a ten-minute walk into the old town. Around four to five kilometres out by road, the guest rooms at the Ock Pop Tok Living Crafts Centre put you on a silent stretch of Mekong bank with a free tuk-tuk shuttle from the centre's town shop; check the running times, and understand that you are staying at a working textile centre, which some people love and others find limiting.
Three things to check before you pay. Whether the room sits directly above the restaurant or reception. Whether "river view" means a balcony or a glimpse between two roofs. And where the air-conditioning compressors are, because in a small converted villa they are often in the courtyard your window opens onto.