FI, his parents and I are heading down to Rosemount in an hour.
So far my interaction with the Rec Supervisor there has been really great-she responded to my initial email 2 hours after I sent it :-) Plus, the $110 6-hour rental rate is unbeatable. The pictures of it look awesome! FI plans on taking more pictures since there aren't many on their site.
Never thought I'd be considering a venue there, I'm really excited to see it!