With a month or two you can do a heck of a lot of kayaking. The alps offer quite a large range of opportunities. With that much time you could do an entire tour. It all depends on your skills and on the water. (a) I can recommend the Swiss Alps in spring, like all the classics around the Vorderrhein close to Chur, then Moesa, Versaca, Maggia in the Swiss Canton Tessin. Then there is some kayaking in the Martigny area and the valley of Valais (never been there though). (b) The Southern French Alps are terrific places with quite some classic rivers. Verdon, Drac, Ubaye, Esteron, Roya, Var, Durance, Vesubie... oh man don't get my started (check out the book White Water South Alps by Peter Knowles). (c) Italy Val d'Aosta (don't know much about it. (d) Austria like Loisach, Rissbach, Inn, Ötz and Venter Aache etc are more in fall... Then there is kayaking in the Pyrenees, in Corsica... So there is some stuff to run out there. Most rivers here have water in spring. As for playspots I know Bremgarten well as it is 20min from my place (ok, I am pretty lucky). Bremgarten is a wave from 120 to 160 m3/s and a hole from 170 to 205 m3/s (check
www.hydrodaten.admin.ch/e/index.htm for water levels). Then there is Hawaii sur Rhone, but I heard the water level has to be just perfect and it's a pretty big thing and hard to get in. There is Rabioux (or so) on the Durance but that one has some pretty bad eddies. There is also a playspot on the Rhone at Visp, Switzerland. Just don't miss Bremgarten. Cheers.