Hi A.. I am not sure which sites you used, but I am involved in a great playgroup through meetup.com. I actually live in Deltona, but I am a member of The Lake Mary Hip Chicks playgroup. It is a fairly large group, but everyone is wonderful. The organizer is great as well. There are membership dues, but it is used for helping with the cost of the website and any extra money is used for holiday parties. There are a few different ones on meetup.com. I have a 2 year old little boy and we have met some wonderful people through there. I will say that right now I am not attending a lot of playdates, mainly because it is too hot for us outside. :)
Good luck,
T.