I really wouldn't move your plants outside and then back inside. You definitely will bring bugs back in with you, and they will have a safe zone to breed in your tent.
Leave your autos to get as big as they can, maybe some very lite LST, some people can top them at the perfect time, I never seemed to be able to find that perfect time. If I top at 4th, 5th, or 6th node, the plant just goes into flowering from the shock and it stays small. I just leave them until they're ready, the longer it stays in veg, the better yield I know I'm going to have.
Autos, unlike Photos, don't triple in size when they flower, what you veg them to, is basically what you're going get, maybe a few inches here and there for bud size. I only started on autos because I thought they were easy because they're quick. They're actually not easy because they are so quick. So little time to correct mistakes, and so easy to stunt them and destroy the yield. My motto with autos now, is leave them alone.