honestly, we've never had that problem but, we've been camping for decades... different tents, different sites, different setups, different bedding... so when we got our PUP, it was different but, all the same... one thing we do [and this might have something to do with our "no problem"].... we sit around the campfire until we can't sit no more and the eye-lids start to close... sometimes it early [after a strenuous day of hiking, swimming, canoeing, etc.] and sometimes it's late....campfires are, for us, the BEST sleep aid... if it's a "cool" night, we have the bunk end windows open and the woodland, night sounds are sooo peaceful [it DID take us 1 night to get used to the whippoorwills on our last outing in the mountains of central PA but, they became an anticipated joy]....SERENITY NOW!!!
... even rainy nights, when no campfire can be had, have, for us, another calming dimension to the "night-time experience" [unless it's "Armageddon", there have been a couple of nights we've chosen to sleep in the car for safety... few and FAR between] ... Bottom Line... the further we're immersed in nature and the farther away from "civilization" the calmer we are, the better we sleep...best of luck... we hope and pray you come to a solution!... and Happy Trails
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