Memorial Day in MNF is one of the few times when campsites will be full, especially at Letts Lake. There's a lot more room up at Lake Pilsbury where there are several developed campgrounds; Navy, Oak Flat, Sunset Point, Pine Point, and Page Point. Other great places to the north are; Plaskett Meadows, Board Tree, and Wells Cabin, but there are many more.
As mentioned earlier, MNF is absolutely huge, and the only national forest without a paved road going through it. The only real limitations for 'overlanding' is that you must stay on roads that are open (no free-wheeling through the vegetation) and you can't go on the OHV single tracks (it will be obvious that these are not roads). That said, having a forestry map is always advisable ( $14. http://www.nationalforestmapstore.com/product-p/ca-9.htm). And even though you must stay on roads, you'll discover that they come in a variety of conditions- although most of them are pretty easy. The smaller roads will be rougher and more narrow than the main ones.
As mentioned earlier, MNF is absolutely huge, and the only national forest without a paved road going through it. The only real limitations for 'overlanding' is that you must stay on roads that are open (no free-wheeling through the vegetation) and you can't go on the OHV single tracks (it will be obvious that these are not roads). That said, having a forestry map is always advisable ( $14. http://www.nationalforestmapstore.com/product-p/ca-9.htm). And even though you must stay on roads, you'll discover that they come in a variety of conditions- although most of them are pretty easy. The smaller roads will be rougher and more narrow than the main ones.