gracie's got a great point with the "take the turn a bit wider" thing. You definitely don't want to hop a curb in a cart!!
Also, you'll see all the standard/2-seater carts parked perpendicular to the curbs in a lot of the parking spots at the squares, for example. No-can-do with the 4-seater design you're talking about - it's too long. You'll have to park it just like you would a car. Depending on where you are, time of day, what's going on, etc., it makes it a bit tougher to find a parking spot right on the square itself. There are usually plenty of parking spaces in the larger parking lots behind the stores, though.
Bill