There's a common thread in these posts. Most, but not all, seem to be pulling into an RV park that they know nothing about and then get surprised. They've driven until they're tired and desperate. I understand that there are reasons for traveling that way, but you have to live with the consequences. There are places on the internet to do research before ever leaving home.
The RV park's own web site. I don't expect the owners to tell me about anything bad any more than I expect somebody to make fun of their own haircut. But they will tell me what they think is good.
RV Park Reviews. If a place gets a bad score because they don't have a pool or playground, that's OK. I don't use them. No dog walking area? I don't have a dog. Electric only? A must for an overnight, but not for a week. Water, sewer, 30 Amp, cable and WIFI for extended stays? Absolutely. Back in only? I have a toad, so only if there's nothing else. That's happened once in over 10 years.
Finally, 300 mile travel days. On the road by 8AM gets me to my next overnight stop by around 3PM, when I have a choice of sites. I also plan for an extra day on the road for long trips - just in case. If there are no delays, I call ahead to my final stop to see if I can get in a day early. Never had a problem.