Spent the second day at a place called "Kentucky Down Under". This was a great place for kids and really worth the time (and $$). Lots of Australian exhibits and animals Kangaroos, Wallabies, herding dogs, sheep, unique birds, etc. as well as a nice cave tour and some other stuff. Spent the night back at Jellystone, was a bit rainy the boys and I stayed in the LG and had movie night. Combine the central stereo and laptop and you can put on a pretty good show. We had a really nice time. By the morning of day 3 my back hurt so bad from the LG standard mattress I could barely walk. Went to Walmart and got a 4" memory foam mattress and it was like sleeping at home. Maybe the best $150 I ever spent!!!
Drove home the 3rd day back to Michigan. Right before I left I picked up a new Garmin Nuvi 660 GPS, amazing accuracy and the points of interest are so helpful, finally I can eat where I want instead of whatever is at the next exit. Used it over and over again. From 200 miles away it predicted my arrival time within 5 minutes of actual... amazing.
Overall great time with just the boys, would do it again in a minute, just wish it was warmer. Element pulling the LG was great, cost me about 2 miles per gallon and I didn't even feel it back there. If you are considering Mammoth drop me a line and I will give you more info and pics.
Take care, bg