I think you’re better off going to DAL (ATL) or AAL (CLT). Unless you have some deep desire to be at UAL those commutes would be easier because those are much easier drives. I see AA has 6 NB jets a day from CHS to CLT. DL has 7 flights a day, 6 NB and 1 757. Those are a lot of good commute options. Standard advice always applies. Don’t commute if you can avoid it, but in your situation make it as easy as possible.