I use a pull up rope tied to the stand and hanging off the ground high enough that when attached at the back of the trigger guard the gun muzzle (pointing down) is off the ground. I make sure, when I set the stand, that I have a clear pull up path...no branches, twigs, vines, etc. I just slowly and carefully pull it up and haven't had any issues with it hitting anything.
If you have a case with a loop or handle in a position that will keep the gun muzzle down, that's another option if you're afraid of banging it against the stand.
I put a leather shotgun sling on mine, attach pull rope to the middle of the sling and pull it up. I bring the gun up level with the ground so the muzzle isn't pointing at me. I also have a leather flint stall on the frizzen, no powder in the pan and hammer down.
Those are most likely the best options. Being an old hardcore bowhunter for many years, treestands are the norm, with climbers being the only type I have used up until this past season. I found a 21 food ladderstand on sale so I purchased it for hunting a known deer travel route hunting grounds.
For many years, I have used two different paracords. One for my backpack and one for my bow or rifle. This past year, due to the age of my paracords, I thought I would try a little heavier and larger size pullup cord. Other than the little additional weight and bulk, it has worked out pretty well overall in both my climbers and the ladderstand.
A couple of things I did learn was that it is not safe to climb a ladder stand with a backpack on, due to transitioning from the ladder up onto the platform. Thus, the second pullup cord helped.
Secondly, when tying the rope around the muzzleloader, it is easy to control it for the most part while rising it up. If tied on correctly, the muzzle will be pointing straight down. As long as I pull slowly until the muzzleloader is off of the ground, then I experienced no banging or clanging against the ladder stand parts. The one thing I ascertain after pulling it up into the stand is, I like to take a peek at the muzzle to ascertain no dirt, mud or debris plugged off the muzzle. I do the same after lowering it to the ground.
So, yeah, tie a pullup cord on properly and pull very slowly until the ML is completely off of the ground. Keep the movements easy while pulling it up and you will be fine.