Not sure that term, but you can get a glimpse from a blog post I did a few years back, if that helps at all. Not a campground review, though.https://travelwiththeslowskys.com/2017/02/27/lake-pleasant-feb-2017/

We stayed at lake pleasant and it had fully developed sites. As far as I know it’s the only one on “lake pleasant” proper.

I stay there often semi developed is a Ramada. level surface in most cases but no power or water hookups. dump station on the way out of lake

It means there is a fire pit, picnic table but no water, electricity or sewer hook up. So basically it is primitive camping but with a designated parking space, usually for tent campers or small vans.

From the county website: Each "Developed Site" has water, electricity, dump station, a covered ramada, a picnic table, a barbecue grill and fire ring. Each "Semi-Developed Site" has a covered ramada, a picnic table, a barbecue grill, and a fire ring. So it appears a "Semi-Developed Site" at Lake Pleasant Regional Park means no hook-ups.

I wondered the same. The "full hookups" are water and electric. There is a dump station on the way out of the park. Because I didn't know I chose full hookups. It is a really nice area.