I've had to add some paper towels to a couple of my tubs last week because of a humidity spike. Just a quick way for me to kinda absorb and remove the excess water in the bedding.
I agree a quick spike in humidity shouldn't be too bad. Just make sure that you are spot cleaning more often in case of bacteria or fungal growth. I'll also mix the bedding again when I spot check to kinda balance out the problem spots and the drier spots.