Nothing to add much to the details of the others except that it's very easy to get stuck in the sand. The main road in is compacted AB but the rest of it is some of the finest smallest softest sand on the lake. In the winter when it's less traveled and after there is rain it's a lot easier to stay on top of it as it becomes compacted but mostly by now it's been churned up over and over and gets to be like talc.
If you come in on the main compacted road all the way to the waters edge and go right (to the south) it's a Long Beach long dog leg left, I think it's the best part of the area, I like the next half mile or so after the dog leg, you'll be heading East and the views are nice towards lone rock and the bay. If you can drive close to the waterline without going through anyones camp the sand is hard and very drivable down there.
If you look to the south of the beach above the dog leg left towards the high bluff you can see roads up there too going East. You can take those from up top by the bathrooms if you just stay to the right. From up there you can look down to the beach and pick a spot and make a long descent, the 1/8 of a mile or so down to the beach. To me that's the best way not to get stuck especially if you are towing, it's easier to keep your momentum up going down hill. I can't emphasize enough for a Lone Rock Newbie just how soft and sticky the sand is there! I either drive in low close to the waterline or up high where I can descend the hill. If you get stuck you can be up to your axels quickly, bring a shovel, a tow strap and a bucket. The bucket is for water so you can wet the sand down under your wheels if you are stuck. It also helps if you travel in pairs so you can Buddy pull out if you need to but by enlarge most people will help you out in short order if you need it.
Lots of folks bag on Lone Rock because of the crowds and rowdy kids and some of that is true but it's a magnificent beach and I've been on it and by it several times this year. I'll bet it's mostly empty of people now that fall is here.
Lastly I wouldn't try beach launching any boat there right now, the beach is shallow forever and the water is still low. You'll have to drive a few miles over to the new ramp next to State Line. Best of luck!