I saw a video where a entomologists talked about all spider in S.C., however the Brown Recluse was the main spider he discussed.
People would mail him smashed spider for him to Id. He said no way to tell, most were almost dust in the package.
But the main thing is that BR do NOT have hair on it body & many of the samples that could be Id. where not BR.
So I guess a lot of people do not know one spider from another, I learned a lot studying & teaching a class for BSA.
An I know nothing really, maybe a shot glass half full. So it is best to catch the insect & take it with you. There are about eight spiders in the widow family, including a brown widow.
One of the big problems with Brown recluse & the Black Widow is the toxin are different & the antidote are different.
My brother got a spider bite some years ago & a shot, but doctors had no idea what kind of spider & the bite rotted, then lift a bad scare. The doctor said it could have been one of many venomous insects, my brother believes it is BR, but the doctors was not sure.
Hopefully their skill has improved in this century.