Pine Cove Campground

This is the only non-reservation campground near Dillon Reservoir, and although it's just an asphalt parking lot and sites are close, it's a great location right on the lake for putting in a kayak or SUP. There are no hookups, but water is available to fill jugs, and there are vault toilets. The camphost has been there many years and runs a tight ship, which is good, He tells everyone on arrival to be prudent with your use of a generator, since your neighbors are so close, and most people seemed to comply.
There are a couple of good trails from the campground, one that goes around the peninsula, and another that climbs a ridge for fantastic views. And it's less than a mile up the road to get to the paved bike path that goes around the reservoir, or to Breckenridge, Frisco, and Dillon. Being at 9,000' though, physical exercise seemed much harder for us.
There is good shopping nearby (REI, Whole Foods, and other grocery stores and outdoor shops), and Silverthorne has a nice community recreation center where we worked out a few times and showered. All of the local communities have free concerts on various nights of the week, which are well attended and fun for something different to do.
We found lots of great hiking in the area and really liked the town of Breckenridge, where we watched a bike race and frequented a couple breweries. It's not a place for quiet relaxation, but there is a lot to do in the area and we would stay there again.

We stopped here so we could do some easy paddle boarding on Lake Dillon and catch a few stages of the USA Pro Cycling Challenge. Most of the surrounding campgrounds were booked out on the weekends, so we ended up here. What we didn't realize until we got here is that the spots are about 50 feet from the water. Most of the other campgrounds you have a decent little walk to the water, carrying paddle boards over distance wasn't in the plan.

The trade off of this place vs. the others near by is proximity to the water for privacy. Pine Cove is a glorified parking lot, and your neighbors can get very close. According to the campground host, (who has been there for 6 years) during the summer (when school is out) they fill up every weekend, so getting in early Friday, if you plan on spending the weekend, is a must.

There are vault toilets, drinking water, and firewood available on site. Two hiking/mtn. bike trails directly out of the lot. The trail to the north is about 6 miles out and back, the south trail is about 2.5 mile out and back. You also have access to the paved bike trail system that runs to Frisco, Breckenridge, Dillon, and circles the lake.

When you leave, there is a dump station a few miles away, towards Breck. $5 to dump and fill your RV. https://www.campendium.com/breckenridge-rv-dump-station