I don't know anything about renting, and I haven't ridden a motorcycle since college. BUT I can tell you this: a Slingshot is NOT a motorcycle. About the only thing one has in common with the other is the open air feel. For me, that's not a bad thing at all. It's good! In a Slingshot, you're some 5" off the ground, so you feel like you're flying at 45 mph. You don't have to go fast, but you can any time you want. You sit side by side, with comfortable elbow room, so you can yell back and forth without having to have com units. A Slingshot is as wide as a Ford F150 up front, so you're much more visible to traffic than the average motorcycle, even though you're low. It's easy and fun to drive, though far more car-like than motorcycle-like in that regard. Think go cart or jet ski for the road. Tons of fun! You mentioned your parents. I'm 71, and have no problems getting in and out. My wife, though, had a bit of a learning curve. Step in, sit down was not an immediate concept for her. She can drive mine, but hasn't much. Her choice, her loss! That said, I HIGHLY recommend your taking at least one or two Slingshots on your Denver trip, even if others are on bikes. The two play together well. Hope you can find a Sling or two to rent, even if you have to go far afield to get what you want. Just don't approach a Slingshot as a new kind of "motorcycle." It's a new kind of joy!