I'm not sure what you expect by involving your body. Long before Cruzbikes came on the scene, I always maintained that involving your upper body (on a bent) might make you feel like you're working out more, but didn't put any extra power to the pedals. That's because your legs alone have the capability of maxxing out your cardio-vascular system. Cruzbike maintains that they can add significant extra power by using the upper body; but IMNSHO all they're doing is using extra energy to counteract the pedal steer that wouldn't exist if the entire drive train wasn't mounted on a swivel. So, once again, they're using more power but not putting any of it on the road.

There's an unofficial bentrider map, which shows six recumbent riders in the Indy area, if you are willing to go as far as Muncie. Contacting these people for test rides, and networking from there, might allow you to sample a significant number of bents.