Im 5'5 and I weigh 175, Ive road in powder before but not massive ammounts of powder. I would like to pick up another board eventually so I have something for powder days but for this trip I think I might take your advice. I could also rent a board from my buddys shop and bring it with me just so I get something a little higher quality. Thanks for your input.
You can get some pretty high quality boards. Last time I was at Whistler the shop attached to our hotel was renting brand new K2 Turbo Dreams as their premium rentals.
I also demo'd a Lib Tech Dark Series for about 3 hours one of the days, so you can rent/try some pretty sick boards if you want.