Kirkwood probably has the best snow right now but since you don't have a car, getting there will be difficult. Same goes for Sierra ( not sure of conditions there).
Northstar has the best snowmaking in North Lake, so if the backside is still open, that could be a viable option (resort closes this weekend).
Snow at Mt. Rose could be good because of its higher elevation, but I haven't been there this season so I don't know.
Since you'll already be at Squaw, you can see if the conditions are to your liking. They've already closed some lifts, so it shifts the crowd to the lifts that are open. Was there last week, Shirley Lake lift was stupid crowded, hopped on shuttle to Alpine where conditions were better and runs were uncrowded.
Backside of Alpine was closed though, so that limits what you can do there. Lapped the wolverine and alpine bowls all afternoon, but that was ok.