I don't have any knowledge of Fort Langley Air, but I agree with Step Turn's recommendation about the area. I did my float rating at Vancouver International, but all my training was on the Fraser River adjacent to Pitt Meadows, Pitt Lake and Alouette Lake.
However, the best experience was landing on Widgeon Lake, a 2500' MSL mountain lake. Even if you do no other float flying, I would recommend a dual flight just for the experience of landing and taking off there.
And in the winter, you can try figure-skating!