You should try the "sitski". It's a bike with skiis instead of wheels. And you wear 2' long skiis on your feet for stability. easy on the knees and you can still slide down the slopes. gawd I love living here.
I was going to ask where you live b/c that would be awsome.....but I remembered I could read I haven't seen that on the east coast, or at least not close to me....it took almost a decade before snowboards were ok at the local ski center.
I made one of those about 30 years ago and it is another one of things I should have patented Dont tell me they are making a come back. Are you a skier of a boarder? My Nephew works in one of the shops there in Tahoe. He is a boarder. His name is Charlie if you happen to go into any of the shops there.