Howdy and welcome to the fire!
Ditto what Gateway Kid said, he's one smart cowboy.
Some clubs may have loaner gun carts for a match, but gotta check ahead. Otherwise some may have racks each stage, or folks willing to share a cart.
Same for the leather, let the MD know what you might need, folks often have extra gear they're willing to loan for a match for new shooters.
Grizz