Deer Creek - I just drove by there today. If you are into fishing, the Provo river is actually pretty well known from what I've heard. Above Deer Creek has some parking lots on the river. Below the dam is beautiful as well. The campground at the reservoir isn't in a very interesting place but has a great view of the backside of Mt. Timpanogos. There is another small campground at Wasatch State Park in Midway if you don't want to be by the water (this is the backside of Deer Valley ski area). There are some commercial rv campgrounds in Heber if that is what you are looking for. One is near the Provo river but closer to the Jordanelle reservoir (not far from deer creek). Midway is a great small town.
Deer Creek also has one of the longest zip lines in the country from what I've heard. Zip line also at Sundance ski resort in Provo canyon. Only 30 minutes to Park City.
