I was just up there for my last day of the season. Honestly I think you are going to ride Sunday but not Monday as basically all resorts are calling last call Sunday.
Conditions arent worth chasing anywhere in the region. Sierra was a mess the day before easter when I was there. Kirkwood is probably the best (backside is alreadly closed) but its not worth renting a car and trying to drive there honestly. If you are there at Squaw...do a couple laps there. There should be at least 6 or 7 lifts open. But yeah..season's done at Tahoe.