We go to Tallahassee all the time to visit our son.  We have started staying at the Moose Lodge.  $10.00 a night.  I doubt you can stay for 2 months.  We have stayed 10 days before.  They have 30 amp and water and a dump station.  Had to hook up  after 7 days to dump but really easy in and out of the site so no big deal.  You have to be a Moose member to stay there.  I believe the Elks Lodge has RV sites too.  We feel both rv parks in Tallahassee are WAY overpriced for what you get, but they do have a corner on the market and can charge what they want.