I separate and stuff my tent into two bags, one for the inner and a waterproof drybag one for the outer, plus I use a footprint because it makes external pitching easy and only weighs a few hundred grams. Tent gets split between my partner and I. Never had a problem with mildew, don't cook in the tent ever, so nothing for mildew to eat. If it's raining the inner gets packed away first underneath the still set up tent, then the footprint and fly go into the wet bag... Tent gets stored in a large stuff sack at home so there is less chance of tight creases forming.