There are tons of places throughout Oregon for dispersion camping.
Lakes, rivers, ocean beaches (not many, but some), deserts, forests. You name it, sooooo many places.
- Check with the managing agency (usually Forest Service or BLM).
- Websites like Ultimate Campgrounds, Allstays, FreeCampsites, etc., etc. list places.
- Blog sites from fellow travelers/campers.
- Use Google Earth to scout out possibilities.
- Drive around an area first with just your truck.
- In Oregon, overnight stays at Snowparks are allowed.....most of which will hold any size vehicle (don't forget the snowpark permit though in the winter months).
- OHV riding areas....especially mid-week.
Enjoy the search.