Think about Les Deux Alpes as well, just across from l'Alpe d'Huez and iirc takes you back into Bourg d'Oisons via the D1091 and you can ride up l'Alpe d'Huez which is the D211. The Mercure there are currently charging less than £60 a room per night for a room, half board for up to two people, though if there are more of you, there are rooms for up to 5 at just under £80 per room per night, half board. It is also cycling friendly.