The key to MB is not going to Ocean BLVD at night. For the most part it is cheap hotels, cheap entertainment. If you are in an RV camping, no problems at your campground more than likely. Going to the various big name entertainment complexes at night are fine as they are far away from Ocean BLVD.
As a SC resident, the closest I would camp to MB in the Summer would be Huntington Beach SP. Away from the chaos but close enough for the entertainment stuff if you desire. It is also VERY close to good restaurants. We only go to Ocean BLVD during the daytime in the WINTER. We enjoy the Skywheel and the Gay Dolphin, but again, only in the Winter.