Great for having the new truck! I'm still finding new gadgets and neat stuff almost every week. I got the 200 amp alternator on mine, and the trailer tow connection does charge the trailer battery whenever the engine is running. I believe it has a 40 amp fuse protecting it , and a relay, as do all of the trailer turn signal and marker lights, and so on. If you think you might want to put a camera on the back of your trailer, the back up light connection DOES work. The bed liner is always nice, but they do tend to allow some things to slide around. You can order a Rhino Liner type from the factory. However, I opted to have a color keyed one installed (my truck is white) by a local body shop, and it has been excellent. Stuff stays where you put it. The factory back up camera is concealed in the tail gate handle, by the way. A few months after we took delivery of the new truck, we traded the fifth wheel in on a Class C. Go figure.