A place to consider for a stay in the foothills above Denver...Chief Hosa Campground located in the Genesee area of I-70 at exit 253. Owned and operated by the City of Denver Parks and Recreation, it is the oldest motor campground in the country.
H E R E - Chief Hosa is the link to their website. They open May 1st each year. There's limited space for RVs and it can be tight, but I've seen big motor homes in there was well as a variety of trailers and other RVs. About 1/2 of the CG is for tents. It can be noisy, since it's close to I-70. Convenient to Genesee Mountain Park, the Evergreen area, the Buffalo Overlook, with the historic Chief Hosa Lodge right across the street. Staff at the CG has always been helpful. The RV Descripton section gives you all of the RV sites, the site dimensions, and whether pull thru or back in. There's only 2 FHU sites, the rest are W/E, and there's a dump on site.