^^^all of the above, except please don't try to bath them since you are a new horse owner and live in Ohio.
Ohio is butt freezin' cold right now and it would be way too difficult to thoroughly dry a horse off. It's not worth the chance of making them sick.
If they're out 24/7, it's going to be tough waiting for the mud to dry but that's what has to be done
One thing you could do, to help prevent scratches and ice-balls from building up around the fetlock areas, would be to cut the lower fetlock hair back. Doesn't have to be "crew cut" short, but back far enough to let the backs of the ankle/fetlock areas get air, instead of holding moisture