I'd book the 3 bedroom NOW at your home resort and switch resorts later if you are looking for a different resort with lower GV point costs. If you happen to be a member at one of the two resorts that doesn't have GVs, then I would make a 2 bedroom plus studio ressie at your home resort NOW and switch later. That way, if the GV isn't available, you will still have a ressie for that difficult time period.