For the past couple of weeks I95 north is a parking lot. Snowbirds heading home from FL to do taxes. I have to go to Charleston 2-3 days per week, I stay on 17 to Point South, exit 33 and avoid 95. If you leave Lake Jasper, just go on across I95 to the dead end, that is US17, turn right to go north and stay on it through Ridgeland, it will try to dump you back on to I95 just north of town, when it bears right go left and stay on old US17, you will cross I95 at Point South.
US 17 is 4 lanes all the way from Point South to Charleston, speed limit is 60, traffic moves at 70. Do not exceed 70, Yemassee and Colleton County speed trap the entire stretch of highway until you leave Jacksonboro and are then in Charleston County.