We used to tow a Hi-Lo and then went seasonal with a 34' TT b/c my DH rarely gets time off and it affords us a recreational life within easy reach.
Pros: Economical by far (we pay less than 2k a year which includes a ton of ammenties and our dock spot), More time to have fun (open the door when you get there and shut it when you leave), make new friends (not as transient), customize your lot, no storage worries (our camper stays there year round), far less wear and tear on the camper, don't need to worry about a TV, everyone knows everyone and looks out for one another (could be a con, LOL), more like a "cottage" really without having responsibility and expense of ownership. Children seem to really love it that they make friends too. No need to pack or unpack, keep your stuff and clothes there. Resale is nice as it usually includes the whole shebang...camper, deck, shed, and perhaps a Golf Cart.
Cons: Get the itch to travel, but some pull out and go places and return when they're done, we got a tent to go places. Initially, setting up your lot is a bit of work (deck or patio, etc), but only do it once really. Politics of knowing everyone.
For more info: I started a thread for seasonal camping.
Good luck. I highly recommend it for economy and ease.