i'm with perry pete, leaving them too much room rather than not enough is a good decision. better more room than not enough, the worst they can do is just strip wax, propolize and burr comb the heck out of things, or whatever floats their boat.......
(or swarm, hope not for you)
for the nucs, 2 deep boxes sounds good, and also for the full size hives leaving 3 supers on until you can get back to check on them.
like you said, you don't have problems with wax moth or hive beetles so you are good to go, and not have that worry. are they protected from bears? can't remember if you did or not?
funny thing about bees, left alone to their own devices for 2 months or two years can be amazing and a learning experience. they seem to do alright under whatever circumstance.
good luck, best wishes to you pete, looking forward to an update from you.