Check out this web site.
http://campgroundreviews.com/regions/Was...oldendale.html These parks are in the area you are looking for, just over the border in Washington. If you will be staying in Bend,OR the Crown Villa RV Park is very nice, but alittle pricey. If staying at Crown Villa coming in from the south DO NOT follow GPS, it will take you down a road that has a overcrossing with too low clearance. Just go up to Murphy Rd off Hwy 97, turn right and follow the road, can not miss the park.