This park has everything you will need.
Nice clean park right on the boarder of Washington and Oregon. As close to downtown Portland (about 8 min drive). There is great access to the river, marina, restaurants, and shopping. There are a few fulltime "family" members that stay there permanently. It’s a comfortable place and pretty busy a lot of the time. Its a nice place to stay if you want to check Portland out. Which generally is a very gay friendly City.
http://www.jantzenbeachrv.com