The riders are riding Peter, it's what riders tend to do a lot. It's not natural to carry the horses as they can't fasten the saddle belts with their hooves. The riders would have to become the mounts and the horses the riders. You could place a bet as to one managing it but I wouldn't want to have too much riding on it
Coming soon ( this evening), mounted horses and a grassed base.
It's drying at the momentCheck out the Gallery later