Champasak is simply a long main road along the Mekong with a roundabout at the centre of it—you’ll find many of the budget accommodation options clustered around here. Several places on the river side are ageing badly, not great value and not the attractive options they once were.
A large rural island in the middle of the Mekong, Don Daeng is a way to further retreat from the outside world. There is only one formal accommodation, a high-end lodge. Homestays are available in Ban Hua Don village—see our coverage of Don Daeng for details on those.