I am in Escapees and paid the extra ten bucks for Days End but found it mostly more trouble than it's worth, Very hard to search and extract useful info. There are a number of free sites that have this info in a useful form. I use Freecampsites.net but Campedium is also popular. I have Allstays too but we rarely used it.
I looked at TSD but didn't like handing over so much information to them and I also waited too long to apply before we left for summer. People seem to like it and it gives a real discount.
Harvest Hosts is about $90/year IIRC, they have a limited number of sites, they have no utilities aka dry camping, and these are commercial spots that expect you to spend $30 a visit in their facility. You can not make reservations and they expect you to leave after one night. Seems like a rip off to me but if you like wineries then maybe you are a good fit.