We have been hiking in to the Tower this past spring from the highway to save wear on the car. Although this is a nice 40 minute hike, this approach may not be an option anymore. Although the vast majority of the hike is on USFS land, you do need to cross a narrow strip of private land. This past weekend "no trespassing" signs sprouted along the fence line, and a note was left on our car, courtesy of Quien Sabe Cattle Company. They own the strip of land from FS Road 6 all the way to the Cleveland ranch, so there is no practical way to get around it. Obviously they don't want their land crossed.
You can still drive in the back way, which remains the same as ever. No 4wd is needed, but please drive carefully so that you don't wreck the steep and loose road. Thanks!
Thanks for the information, Schmuck. We've done the hike-in from FR6, parking just beyond the cattle guard. Hike paralleling the barbed wire fence, over the saddle and into the side canyon that goes past Child of Light and down to the Tower. This route is 2.1 miles and about 600' of gain but has one parking and hiking all on public land. It's a bit more of a hump than the route across the private land but it works well.