You can get some great ideas from visiting some of the Escapees parks. We've stayed in three of them so far and found them all to be really nice. Two were outstanding and one was OK. The OK one was one of the first to be built. It's the one near Casa Grande, AZ.
The nicest one we've stayed at was the Park Sierra, CA park. It is near Yosemite, CA. A close second was the one in Sutherlin, OR.
The parks are built for RVers by RVers. So they really know how to do it. Checking them out would be a good starting place for how to do a park.