The smell of auto's can be quite strong. I have some now that i can smell across my yard when my windows are open(they are inside). I suggest keeping them outside if this is a concern.Or make sure your indoor grow space is sealed tight.then make a active carbon filter to exhaust heat.This can be done cheap and easy.Walmrt sells active carbon by the fish tank supplies.Then get youself some 3" pvc pipe and a few fittings.If you are able to bring them in , and put them out as needed,Then i would do that. Not sure if you have neighbors who would see you bring them in . Also if you have a shed or barn.You could set somthing up just to house them at night to give them more light. One of the most important factors of an auto, when it comes to yield. Seems to be the amount of light they receive.If you decide to grow them outside.Then just try to start then indoors and i would keep them inside till they start to smell.that would allow them to develop great structure, as well as give mother nature time to increase daylight. As far as starting them in the 2 gallon containers. it will work, but i always start in a red dixie cup for the first 2-3 or till signs of flowering. Here is why.When you have a seedling in a big container, it is hard to maintain the proper moisture in the soil.If you soak the soil the seedling has all that moist soil to work with.It will take longer for soil to dry out,also longer till you water again.watering brings oxygen to roots Less watering less oxygen. Plus a plant like to dry out between watering. 2 gallon container is fine for small to medium auto. i go with 3 gallon for larger strains. Honestly i have never done an auto completely outside.I have started them inside placed them outside.Then noticed they were not yielding like there sisters inside. So i brought them back in to join the rest of the family.