The All Mountain Adult Workshop is probably a good fit for what you are looking for. Since there is a ski off to split people into ability groups, you shouldn't end up over your head.
Note that when I did the Workshop the day after arrival, I hadn't had time to acclimate to the altitude enough. So I was pretty tired by late afternoon and opted to skip the last 30 min. The snow was deep enough where we went that I was working reasonably hard given how well I skied back then. So you might want to wait until the second ski day.
First day will be at Snowbird, since that's where we're lodging, so that's easy enough. Thanks!