Champoeg State Park,
We stayed here in July 2008. I had passed through a couple of times when I had my 5th wheel, but they only had Loop A at that time and it looked rather close of maneuvering the 5er. In the past couple of years they have revised the park and added/upgraded the Loop B. Loop B is more open that Loop A and the sites are farther apart, the unfortunate thing is that Loop B has very little shade. This is a historic farming area, lots of fields and interpretative sites. It borders the Willamette River, but there is not a place to swim.
We stayed in Loop A. Its the older loop and has some good shady spots. Most sites come with a table and fire ring, although not all have the fire ring. There are plenty of 40-45 feet long sites, but some shorter ones as well. Visit their web site and make sure it you have a longer trailer. Loop A is where most of the tenters and multiple families seem to stay, therefore its a little noisier than Loop B. Most sites have water and electric.
Loop B is newer, more space between sites, and longer sites. It also contains the full hookup area. I does not have much shade, so on hot sunny days, it can be difficult to cool down. On our stay, Loop B was quieter at night, due to less crowding, fewer multiple campers in one site, and less children. But even in Loop A, things quieted down about 10:00 pm, as prescribed in the rules.
They have a couple of large group camping areas and a group RV area with a meeting hall. They also have a “club” camping area for RVs (6) with w&e hookups, as well as 9 full hookup sites. There are about 4 miles of bike trails, as well as many hiking trails that prohibit bikers. One ride takes you to the Butteville Historical Store for ice cream and milkshakes. There is a dock on the river, but I did not see a boat launch anywhere. There is a frisbee golf course and they sell discs in the visitor center. Yurts and cabins, so you could bring your non-RV relatives or friends.
The park fills fast for the weekend, make your reservations a long way out. We came on Sunday, otherwise wouldn’t have been able to get in. In the summer, there is usually a historical re-enactment of some sort at the visitor center, plus they have a program on Tues, Sat, Sun evenings all summer long.