It is, but your driver's license, tags, and registration must all be up to date or they won't let you on base. You can purchace seasonal tickets online. You will need a copy of everyone's birth certificate, driver's license, and a mailing from a utility bill / invoice with your home address on it; no PO Box addresses.
Only during the week you can go on the weekend if you are accompanied by military personnel or know someone with a military ID to go with you
When you go to gate at Fdrest drive gate/entrance, have all your vehicle papers and license in hand- they normally have a person you can pay in the building by the gate.
Well if you enter Fort Jackson Army Base, you can pay to swim there.
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