Hey
@threecube, hope is all good, here are my takes on your questions.
0- Less stress = better results for autos keep that in mind.
1- If you can, you should leave them in the light, autos have to go as smooth an stress free.
2- Aim for a minimum of a 2 gallon pot, better would be 3 gallon. The rule is the bigger the pot the bigger the root system and bigger the plant gets. A side note is that transplanting autos may cause stress and stunt, so next time you can plant in the final pot. Type of pot comes to preference, smart or air pots gives the root more oxigen, faster growth, but dry faster than solid ones that you water less and have the downfalls of it...
3-If you think water won't be enouth for this days you are out(or when you make a longer trip), take a bottle make some holes in the cap and fit in the soil, cap facing it, make sure the water is not running and is still, that will moist the soil gradualy. In you tube you find many diy tutorials on that.
4- In your first grow I strongly advise you to grow naturally, no training, autos are super easy if you avoid issues, have a look on my Stress Killer diary, i have only done leaf tucking, super basic and pulled a very nice yield.
Cheers, happy growing!