Being one of the dudes in the pictures I will bite on the snarky comments and say it is a small part of the game on the national level.
Rock on with your lead sled and remote trigger... Those setups all include prep time, so if you can get your sled, barcalounger, and
https://www.tracking-point.com/ set up in 2 minutes and get 10 impacts with 10 rounds out at 500-1000 yards on multiple targets at multiple distances on 1.5 MOA targets good on you.
I have worked with a lot of new shooters to the game and the the overwhelming comment is "this is a lot harder than I thought."
Most of the time a stage is just a bipod and a bag, but these photo's are some of the more specialized stages that are thrown at the shooters and are pretty neat photos to those of us that actually go out and shoot this stuff.
For example there are stages where a manufacturer sponsors the stage so you use their shooting sticks/tripod/rifle-mount. With that we find the best way to use the stage prop and get impacts with the gear we have to use.
If your at a location that holds local matches (Las Vegas Desert Sportsmans Rifle and Pistol Club has monthly matches) you can actually do it and see what its about. Normally the people out there at these matches will bend over backwards to help out new shooters and freely share gear... but if your a jackass out of the gate your mileage may vary.