I've stayed here a couple of times. We enjoyed it, but we like the campgrounds further south at MB. Out favorite is Lakewood. The lots seem a tad larger and there are several with shade. MTP is very near shopping if that is important, but we have three boys, so shopping is not on the list of things to do. Mine love to play putt putt, which is included at Lakewood, they will play 3-5 rounds a day. They all have indoor/outdoor pools, great beach access and lazy rivers.
BTW, The campground near Murrels inlet is Hunnington Beach. Never rv'ed there but have taken our scout troop several times, neat campground. Racoons at Hunnington are huge, so secure everything at night