I'd like to know this, too. I've never used valet parking, but DH and will be going to Niagara Falls and it seems our hotel forces you to use their valet services for $20/day. This just seems really steep to me, but again, I'm sort of out of the loop on this subject!
So should we still tip even though we will be forced to pay $100 to keep our car there for the week?
-Laura