I've started dye tests on the pants. Instead of just leaving the green as is, I decided to go ahead and try to tone down the green and make them a little more brown. I also pulled the lower pockets off a USMC BDU to use as the cargo pockets on the pants, so I've also been testing that too to try to cover the camo print.

This is the pants fabric untreated on the left and after color remover on the right. So that alone is an improvement.

If I remember correctly, from left to right this is: pants with dark green, camo underside with color remover and tan, camo underside with remover, camo underside with remover and dark green, pants with remover and tan, pants with remover.
I still want to test dark brown on the pants and camo, but as a fallback I'm happy with the tan on the pants. Neither the color remover nor any dye covered the camo well enough (I didn't even bother taking photos of the front of the fabric), so now I'm considering ripping them apart and stitching them back together with the non-camo underside of the fabric on the outside (inside out, essentially) if the ripstop isn't too obvious, or using them as a pattern with different fabric.
I've also got to a good "finished" point with the holster and knife sheath. I sprayed them with a red-brown Rust-Oleum primer I already had, then for some gloss to give it more dimension I went over that with a *very* lightly watered down Tacky Glue (which fantastically stays flexible and doesn't crack when it's dry). The foam was heat sealed with an iron before it was assembled and painted, but otherwise didn't have any sealer as a base. I used the same Rust-Oleum on the leg ties, which were just lengths of cord taken from an old belt.
I'm not thrilled with the "US" imprint - I tore up the circles too much, and I added some ink to the background to help with depth but it turned out a little too dark. *But* it's still useable and it's still better than when it had no imprint at all. And since I've got the sheath, I think I'm going to skip the knife itself. Having the sheath there is the most important thing, and my "knife" would really only be the handle section anyway. So if I have time later I might go back and mock one up, for now I'm just going to add the last few bits of black metal detailing to the sheath and call it good.