So when I was at the Bull Run Shooting Center on Sunday I saw multiple shooters that has rigs that looked like converted jogging baby strollers.
Chatting with them they told me you can get them on the web at Rugger Gear.
They are called "Shooting Carts" and that are designed to hold 1 to 4 guns and gear. They can run on lots of different kinds of ground. They can carry a lot of gear like guns, ammo, gear, a cooler, food and it even has cup holders!
--If you skeet and trap shoot a lot, this baby is a big help.