With my minis, I use an easy entry.
Hubby and I are on a mini horse driving drill team (
www.minimystique.org) and we use Frontier carts (or carts verrrrry similar... hubby's isn't a Fronteir):
Our other driving we do is combined driving. With my Fell, I use a Pacific Carriage Dartmoor. These are "marathon" carriages that are very commonly used in CDE. They are safe and sturdy for the demands of the sport
For our minis, we use a different brand of easy entry. Love the marathon carriages, but it's hard to find a good mini one. They're often either not made as well or too heavy for a single. Luckily there ARE nice ones available now, but cost prohibitive right now, plus we can't transport Harley's carriage and a mini's marathon... our truck hand hold Harley's plus one mini cart and that's with the mini cart's wheels taken off lol! Anyhow, we use Eazy Ryder (no longer made) as they are a MUCH smoother ride :)