Simple Guy Looking for Simple Truck Camper (Short bed)

I drag race and tow a 20 foot enclosed trailer. Looking to get a truck camper for my 2004 dodge ram 2500 quad cab short bed with the 5.7 hemito take to race track instead of hotels

So its just me staying the in the camper. I am having a hard time finding the exact camper to fit my needs and was hoping someone on her can help me. My bed measures 6'5". I would like a camper with a shower, fridge, and ac unit that will allow me to close the tailgate.

Basically all that i want is the shower and to close tailgate!! I can live without the fridge if need to.

Any models out there??

Thanks!