I took 6 credits online last fall while I was doing the program. The classes I took weren't that hard (intro to psych & personal finance.) I usually took my homework with me to work to do during my break. I got most of it done during my breaks (45 min a day) & then just had to take my quizzes when I was at my apt. I usually spent either a morning before going to work or a few hours on my day off finishing whatever I didn't get finished earlier in the week.
If you talk to the education people when you get there, you might be able to get set times off so you can do your homework. I didn't do that, but I usually had the same days off every week anyways.