We've been to Mother Neff a few times.  It is a great little park.  A few years ago, they rebuilt almost everything, and it has been amazing every since.  I do wish they would eventually reopen the original front entrance, and that area, though.

We have stayed in sites 19 and 20, both of which are nicely secluded.  Most of the sites are not crammed together, but we like these two the best.

The trails are great for any exercise level, and there always seems to be something new to see while hiking.

This is one of our favorite state parks.