We always go to HHI off-season, never in season. Virtually all activities run year round, even if only one or two people are signed up. I've gotten one-on-one activities twice. What can't you do? Gee, you won't have the "joy" of waiting in line at almost any restaurant. We don't even know which restaurants take reservations-we've never needed them. Activities? What we like best is just sitting in the adirondack chairs at the end of the resorts and watch for dolphins and boats coming in and out of the harbor. And if it's warm enough off-season is a great time to go bicycling, and there'll be more room on the bicycle paths than there probably is in the summer.