As someone that writes for a number of things, I do read both Trip Advisor and RV Park Reviews. I also take both with a grain of salt. (Did you know that salt is an open ended lattice - a single grain can be huge.)
If I see that the only reviews posted are old, I approach with caution. We went into a restaurant once before I had a chance to get to the web and had a delightful meal. When I got to TA, the last review was years old and bad.
We also picked a CG once that had recent and rave reviews on RVPR. It was a total bust. My guess is that the owner either wrote or paid someone else for those. While being entirely aware of possible litigation, I made it very clear that this was not a place to select for a pleasant time.
Are you aware that RVParky has reviews of many of the stops too?
Matt