While they haven't yet announced the schedule yet, there is a chance that Candelight Processional will be on that Saturday (12/1/18) (and Sunday) this year. It's often been the first weekend in December. So if that's something that might interest you, it's something to consider. CP does, usually, mean large crowds on Main Street (and parking impacts), but does not necessarily mean longer attraction wait times. They won't officially announce CP (or the narrator(s)), so you'll need to keep an eye on the rumors/leaks/etc. that start to come out in the later half of the year.
Otherwise, I've found that Saturdays lately do seem to be pretty manageable (at least compared to Sundays). It might also give you two nights to choose from for F! (F! may still be on a weekends-only schedule at that point, Fri-Sun). Personally, with all of the things to see and do during the holiday season, I would almost always take an extra day at DLR if it's available.