We stayed at Park Center a number of times. Most of the older sites are very narrow and some are not level and require blocks under the front tires before the leveler rams can do their job. Not all are unlevel,some are okay.
I wouldn't go back if I couldn't get in the newer more expensive section. I suspect that it will be difficult to get in the new section because a lot of people want the larger sites.
There are a lot of people that have been staying there in the winter for years.
Because of that it may be difficult to get accepted by some of the cliques at first. We did make a few friends with some of the regulars and many newcomers.