My space is also sort-of in an attic, but about a third of the size of yours, Im scrogging. I would say if you really enjoy hanging out in your room and watching every branch grow from your plants and would like to direct it where you want, then scrog. If you prefer to get in and get the hell out before anyone misses you, then dont.
If you are really curious, try it once and see. Wont cost you diddly-squat.