A buddy and I are considering a trip down to the keys from South Georgia. We would want a quick overnight (in and out) right off of 95, somewhere around Palm Beach to Fort Liquor-dale. Right now, I'm looking at John D McArthur, Hugh Taylor Birch or Oleta River campgrounds. Are these booked a long way out? Are there other options I should be considering? This would be a quick trip on the way to the keys, so we're not looking for a lot of amenities; just a place to park, pitch a tent, get some rest, shower and go again the next morning.