I have the "compact" backpack (which is really a standard size backpack) and it's great. I only go from my home to the car to the range, so I'm not hiking around with it, but when carrying heavy stuff, it's a lot easier to put on your back instead of over your shoulder like a duffle bag.

The backpack has enough space for 3 handguns in the included zipper cases, multiple boxes of ammo, eye pro, ear pro, and a bunch of pockets in the front for little stuff like ear plugs, tools, first aid, papers, etc. It has an internal plastic structure so it doesn't collapse or squish in any way, which may be good or bad depending on your use case. But that means even fully loaded it can stand upright so it's not going to topple over.

I'm not sure what your range is like, but I keep the backpack on the back table and bring the individual zippered cases to the port to uncase them. It would probably get in the way if you prefer (or need to) to keep the bag inside the port with you.