We just got back from there a few weeks ago with our 2 year old. Stayed in the Reef View and it was everything the brochures describe. Our view was exactly what was in the book. There is loads more accomodation types than I first thought. Theres the Reef View, Whitsunday Apartments (self catering), Holiday homes, Beach Club and of course fancy Qualia. I assume 'on the hill' would be holiday homes rented individually. One Tree Hill is a hike but the Island has both public transport that takes you up there every 20ish minutes or you can hire a buggy for about $95 a day (some accom types have a courtesy buggy too)

Honestly, its all gorgeous there, you cant go wrong!

Have an awesome time!!!