I have been there a number of times. It is an nice campground, although it is crowded during the summer months. We have never really used the campground for anything more than a place to stay while at Hershey Park.
My oldest will be at Hershey Park on Saturday with her Intermediate School Jazz Band.
We stayed 1 night several years back. It was a nice park with nice amenities but the area we were in was fairly cramped. We did not have our current 5er at the time and the unit we had was 27ft so they may have had us in a "smaller" section. We were impressed with the overall cg. It was nice and clean. We wished we had more time there.
Hershey highmeadow is definitely an enjoyable place. It’s very clean place and especially I like pool. I just faced two problem:
1) This place are very small and very close together.
2) The railroad tracks that run along one side of the campground.
Otherwise, it would be memorable for you.