In south Louisiana before a trip, you check your Thermo before your weapons, LOL.
Re the click, had good success letting gas flow as Lowrider mentioned, plus always wrap it up with jacket, place inside jacket while wearing, or inside backpack, anything to muffle the click. I find the noise level acceptable like that.
Another thing, I drilled a hole at bottom and attached a lanyard, and usually tie off to tree, or stand, whatever, to keep from dropping. Also have used Velcro on Thermo and stand, keeps unit level as suggested.