We love the Boathouse and the Hoop Dee Doo, but they are two very different things!
If you're looking for a quiet, romantic, somewhat private experience, I'd go to the Boathouse. Their service and food are top notch.
The Hoop Dee Doo is pretty much a full evening, and just so much fun...but not quiet! If you're looking for an evening to eat, laugh, and just kind of relax and enjoy some crazy jokes and songs, this is for you.
I don't envy your decision. We've been doing both once a year! There are no bad choices here!