There is a lot of dispersed camping around Breck, but not sure it is accessible in winter. Check with the Dillon Ranger District, White River National Forest in Silverthorne, CO. We worked at the FS campgrounds on Lake Dillon for 3 summers. There are no RV parks except Tiger Run which is for rich people and there are plenty of FS CG's, but all would be snowed in. Wonder if you could move around in various parking lots...like City Market in Dillon, etc.? Maybe one of the churches would let you park for a donation.