Hi Paul,
I've seen folks start out carrying guns. It didn't last long. Remember you will need ammo too and on hot days, water is a good idea. I also have an umbrella, seat, brass grabber, and brass basket on a broom handle.
Also, you can almost tell the new shooter's carts by the size. If you've got a pickup, or it is easy to dissassemble, that could be okay. Most folks go to smaller carts or those that break down. Then there are the Rugged Gear carts. They are very light, canvas, hold lots, and fold.
In the mean time, there will probably be many folks with room for another person on their cart. I do.
Happy Shooting,
Allie Mo