Ptero, we took the boat down on her own bottom when we were there, but most of the big boats put in at Pierside, which is up the river (Cooper) a bit at the Old Navy Yard in N.Charleston. Charleston City Boatyard is way up a creek in Mt. Pleasant I think it is most stinkpots and there is not a lot of water up there at low tide. I don't know what's over on the west side of town (Ashley River side), it's kind of shallow over there and I'm not sure there are travel lift services anywhere closer than Pierside. Lots of info on older SA threads and you can always PM Mr.Clean...and folks on the CRW website.
CHR&M is where the party is (unless things have changed a lot this year) and where most people keep boats. Prepare for a long walk from the parking lot to the boat though!
We rented a house on Isle of Palms (pleasant 10-12 minute drive to the marina)....house for 7- 8 cost about 300 per person which was very manageable and we did some redecorating so that everyone pretty much had their own room (using cots and couches and stuff). Also cheaper than CHR&M is the Hampton Inn just over the bridge in Mt Pleasant...about half the rate of CHR&M and a decent breakfast, clean and quiet, a short walk to the bridge (you can walk over the bridge, very fun thing to do) and a few minute bike ride to the marina. Also close to Whole Foods and you can provision the boat's lunch with a quick stop in there b4 you head to the marina. Charleston is restaurant heaven, but one of our faves in the Red Drum (Gastropub) in Mt. P...pricey but they will treat you right. Rent fat tire bikes at Mike's Bikes on Coleman Blvd...15 bucks a day, cant beat it.
We had eveything from NW 15-25 on practice day (thurs...had an M.O.B. in fact) to a more civilized 8-12 racing offshore to an abandonment (last day) winds 25-40...peak gust on Sullivans was 62 mph when I left on Sunday!!! Good call RC!
Great place, a terrific town and I envy y'all going down there (or coming up from the SouthLands ;-) pic of the hike to the boat, below