Bug check definitely
I have heard quite a few people cry out in despair when they bring their plants inside with little hitchers that then infect their other indoor plants.
In terms of watering and fertilizing, I think it depends how hot/cold it is where you are (I am in England so have no clue about zone temps in USA). If the soil temp is below 55F the roots will be dormant, so much less water is needed, and some people don't fertilize at all. There are mixed thoughts on fertilizing. Some people fertilizer normally, others at half strength, others not at all. Personally I am going to use half strength as the months get colder.