In reply to GravitySucks:
The area round Lake Annecy has many safe trails up interesting little peaks around 2,400m, there is swimming in the lake, campsite Lac Bleu at the east end of the lake has apartment s and mobile homes to rent and a restaurant. Obvious water based sports opportunities. I tend to head further south for better weather, the Hautes Alpes. Alpes Dauphine Camp site above Gap has a restaurant, take away meals, many walks in the Champsaur valley. I seem to remember someone organising a raft descent of a mini canyon. Look also at sites near Embrun in the main valley, near enough to Briancon to try the cable car. Canoeing on the huge Serre Poncon lake/reservoir. Camping Deux Bois has mobilhomes to rent.