Suwannee 1st Time Help

Flying out from Seattle thinking of getting there Wednesday or Thursday to try and set up vs on Friday.

Can you enter the campground at any time? If I fly in late am I having to wait until the morning or do they have people there late in the night to let you in?

Fly into Jacksonville or Gainesville? (Just Whichever is cheaper and has better times)

Also tryna gauge buying tent stuff out there for the weekend vs rent a car and get a car pass.

Might be sending Solo incase any folks down to carpool potentially from the airport.

Thanks so much in advance, have gorge travel info for trades if needed lol