Hmmm...well, I know from the photographs that Snowflake did look pretty fluffy but I really don't know if he was that much hairier than most other gorillas. The blue eyes were kind of a nifty anomoly though. I think there was some disagreement as to whether or not Snowflake was really an albino.
As for white bigfoots, there are several reports that have indicated a white bigfoot. Some of the speculation tends to revolve around the possibility of bigfoot getting "grayer" with age, much like a male gorilla becomes a "silver back" as they grow older, and much the way people tend to go gray or white as they age. But, as they say, better to turn gray than turn loose.