Don't know how I missed this thread. I drive! I have a mini, Clementine, that I drive and a Missouri Fox Trotter, Red, that my father and I drive.
.
I've got a basic EE cart for Clementine and this fall was able to find a sulky. I've been looking for one for several years and happened to find one on a local sale site (like craigslist) for a killer deal. I took it all apart, cleaned and repacked the wheel bearings, used steel wool to clean the whole thing and then painted it lime green with pearl white wheels. It turned out fantastic. For some reason I don't have a pic of it on my computer... Anyway, I need to weld some rings on it for my breeching so I can drive it on hills. Clementine is very sensitive to the cart riding up while going down hill.
For Red we've got a really nice Doctor's Buggy and an Oak Meadowbrook cart.