I like Walterboro pre season, lots of ball and ran on tight schedule. 1 hr slots and play 5 times in one day if I remember correctly. No trophies etc. Also not much in the way of accommodations nearby if coming from out of state.
AIT is not the AIT of old. Sad, but with the rule changes, there is no going back. Still a good tourn and Charleston area can be nice place to spend spring break.
BE tournament is now ran by Summerville.
If coming from out of state, compare your home state rules to SC tourn rules in regards to how many games are allowed. Rule differences may drive you to one tourn more than the other or entice you to stay local.