Living in the area, we go to LBL at least once a year, and usually several times. There a limited number of full hookup sitee, so a reservation would be a good idea. Most of the others have power and water only. We have stayed at all but one of the campgrounds, Energy Lake is not really suited for our 30' class A, but is nice for smaller rigs, and is preferred by many. All have water access, and many waterside sites, but are premium priced, and well worth the slight extra. Our choice is always determined by what else we are planning while in the area,
We actually prefer Hillman Ferry over Piney, but it is a lot further from us. If travelling across I-24, Hillman Ferry or Canal are best choices. Canal is COE, but it is a lot older, and can be tight for bigger rigs. Most sites have plenty of space from neighbors, but some areas of Hillman Ferry are pretty close.