Zoom, this doesn't relate directly to this thread, but it occurred to me that you, your husband and son might really enjoy the Midwest Women's Mountain Bike Clinic. It's typically held in mid-June in Brown County State Park, in south-central Indiana. As the name suggests, it's a clinic for women of all skill levels, but there's also a kid's clinic. The trails in the park are excellent and would likely appeal to your husband. Prices are reasonable, and camping in the park is also pretty cheap. It'd be a great place to show off your new 29er!
Just thought I'd put a bug in your ear!