I believe there are several spots that would be suitable for your rig.

Should be no problem with many of those sites.

There are a few that will accommodate you. We stayed there with a 46 foot fifth wheel towed by a semi. There are two entrances to the recreation area - the entrance furthest away from the bridge has plenty of room to park so you can scout out a site. Last July, there was quite a bit of washboard road, so plan on driving slow.