This website has all the information you need for mail in voting.
Sumter County Supervisor of Elections > Home
You can hand deliver your vote to the Govt. Offices in Powell Road, Wildwood, just off 466a where your vote will be handed to the Officer in charge of receiving ballots. Also, I am informed that the various Rec Centers will have boxes for ballots where you can deposit your vote. Personally, I prefer to get mine into the Government Office in Powell Road.
Check out the clickable link which has all the information anyone could need to know about voting.
May I suggest you don't listen to any more gossip, it will drive you to drink.