Once again, why are you worried about being silent and carrying thousands of rounds of ammo on a backpacking trip? If you can find a dog that will come nudge you awake prior to barking, have him call me, I need a good accountant...
Also, I doubt you (or anyone for that matter) can hit ANYTHING out to 300 meters at better than 15% with a .22lr (not sure what you are shooting at this range... def. not sure on a BACKPACKING trip) with a 10 inch suppressed barrel using sub sonic ammo (you want to be silent afterall.) There is nothing NECESSARY about a suppressor. Can they be convenient? Sure. Can they be handy? Yes... Necessary? Definitely not.. I go into the woods every season without one and have not had the first problem yet.
Also, in all of your Oh so extensive and repetitive posts, you have yet to answer any of the questions asked.... scratch that... we know it is a backpacking trip... We still dont know why you need thousands of rounds of ammo to hike, why you anticipate needing a suppressor to hike, why you insist one must shoot thousands of rounds a month to maintain competence, how much practicing you plan to do while hiking (also contradicts your "necessity" to remain unnoticed as thousands of pops will not go unnoticed.)
In short, your post makes no sense.
This is like throwing rocks at a capped barrel.