Hi Ted
Not sure, but I think Alloutte is a hydro reservoir, with all the attendant bullshit associated with reservoirs (hugely varying water level, etc).
Good for you, paddling this time of year. I don't think my gear is up to a February paddle, or I'd be in.
Good luck!

edit:
You might find this usefull, its a photojournal of my trip to Chilliwack Lake, showing road conditions, etc. Chilliwack Lake is very nice, I highly reccommend it. There might be snow, but maybe not.
http://picasaweb.google.com/tomfromvan/Chilliwack_Lake_Paddle?feat=embedwebsite#