I had a minor problem with my trailer last week and a woman at the barn recommended Richard at Zeiglers (Seiglers?) Garage in Beech Island, about 10 mi W of Aiken. 803-594-0015. He was very nice and quickly fixed me up though he didn't have the part I needed. He sent me down the road (closer to Aiken) to pick up a part at Ronnie's, which seems to specialize in trailers. 803-594-9340. Hope you don't need any of this info!
There's a guy called Trailer Doc who comes to your barn. He's a little odd but does a good job. I've had him spruce up my trailers each spring before heading home. 803.508.DOCS (508.3627)
Ronnie's is also high on the list.
Proud and achy member of the Eventing Grannies clique.