Good luck. I don't think that the loss of privacy is worth the money saved. Especially with a complete stranger. Am I the only one that finds this a little ? Probably. Maybe I'm just anti-social.
I wouldn't take it personally if no one responds... we are avid tent campers at FW and we find the sites to be a bit compact with 2 tents. Most campers will have a tent as well as an awning... so adding an extra can be quite tight and not necessarily the number of people but the actual tent footprint on the pad itself.... For us... we take up the entire site so even if we wanted to add an extra tent... I don't know where we would put it. Good luck though