Thanks everyone for all the info!
After much discussion, we have decided to stay at Wilderness Lodge. My parents liked how it was set up more as a hotel - they love to relax in the lobby and "people" watch, and really liked how they could take the boat to the Contemporary and MK. DH and I like OKW, but have never stayed at VWL, so it will be an experience! We are also staying at BWV for the first part of our trip, so it will be a completely new environment when we get to VWL!
Thanks again!