Before moving to Charlotte, whenever I traveled I always found ways to not have to do long term parking because of the added hassle and expense. However, I now always use long term here. It's only $4 per day. Seriously?! That is an awesome deal.
The shuttles come around frequently and they have little cards available for you to take so you remember where you parked by the time you get back from your trip. The drivers are friendly.
Lately they've had parking attendants in the lots to direct you to the next parking area. If you don't obey where they guide you, some may start yelling. So, just do what they say...traveling is stressful enough without getting yelled at.