We stayed at South Jetty last summer with our Redwood, also at LaConner in Washington. Those two campgrounds were our first experience with Thousand Trails and our brand new (to us) Redwood. Here's what I learned:
1) I will NEVER AGAIN pull in to a TT campground without walking the site first.
2) I will always ask at check-in where I should avoid with the length of my rig.
I was so angry at myself (and TT) for turning me loose in an unfamiliar campground, not knowing their system of "pick the site you want", and I have the tree branch scrapes to remind me. Please don't do that to your Solitude.
South Jetty is tight but they do have spots that can accommodate big rigs.