I wouldn't necessarily discount Oyster as a possible base camp. There's a great site on the peninsula at the north end of the lake that has access on both the north and south sides of the site. I was there in June a few years ago and didn't really encounter that much traffic there. We were just passing through and stayed one night there, but it certainly gives a great flavor of the BWCA. But I also agree that Warrior Hill and the LLC pictographs are simply awesome.