^^^ What Rob said. I'm pushing age 70, arthritic, very limited range of motion in neck and right knee, I can walk a few miles in a day's match but it gets more challenging with each trip around the sun. So I can relate to what you're asking. I use an old 3-wheel jogging stroller which carries a medium or large range bag perfectly with room left for a few bags and other incidentals. It has rubber-coated firearm-rack carriers clamped to it, but I've found that 15-20 pounds of scoped rifle makes the rig top-heavy and unwieldy on rough terrain (in matches using PCCs or light ARs, this isn't so much an issue). I just carry the heavy rifles cased on top of the range bag or, if the walk is short between stages, I carry the rifle in one hand and push the stroller with the other.
You don't say how long you have until your match. If you haven't been already, the best practice you can do is repeatedly moving into as stable a position as you can make atop barrels in any orientation they can be placed, on a step ladder to simulate a barricade (all the way down to the lowest step)... even off a rope suspended between trees or poles. While learning to build and shoot from positions on, around, under, or in all sorts of props is important, transitioning into position smoothly and quickly or from one to another is what eats up time for me. I admire some of my younger buddies who can plop bag and rifle into position on pretty much any prope and have the first shot AIMED and SENT almost in a fluid motion.
The worst stages by far for me are those requiring the shooter to go prone, shoot, get up, move, and shoot from something higher, then back prone again - five down&ups for five pairs of shots. Age and body damage limit just how fast I can do that, and I always time out on such stages. But I still enjoy the competition environment and will stay with it as long as I can.
Enjoy.
. Great shooting out there. It was an awesome day.
