The Prosperity site, 2-94, is actually the closest site to your location, most likely. And it's not simulcast as far as I know. The question is, does it carry the talkgroups you're most interested in listening to? The only way to find out is to program it and see what you hear.
On the Palmetto 800 RR database page, look at the very top of the site list, and you'll see links to "Site Maps." If you click on the "FCC Callsigns" link, it will show you all tower sites that are part of the Palmetto 800 system based on the FCC licenses we have linked to all sites. If you click on "RR Locations" it will show you the location of each individual site based on the location information we have associated with each site. You have to do a little deductive reasoning to figure out which site corresponds to which pin on the map, but if you have a sense of the locations, it's easy to see which are simulcast.
You're probably also within range of Harbsion (which is also not simulcast), Lexington and perhaps Winnsboro. As Evan mentioned, location is everything, listeners a few doors down can have a much different experience. Elevation relative to nearby terrain, extent of trees surrounding your property, nearby commercial wireless towers, your antenna arrangement, all factor into your ability to monitor.
Let us know how the Prosperity site works for you.