If I'm spending YOUR money, Diesel. And Diesel is a great fuel besides.
If I'm using the coach like you say you will and I'm spending MY money, it's LPG.
I wondered if the Diesel came with a weight penalty. It's 208-lb according to specs, and the LPG is 172-lb. 36-lb penalty doesn't seem like much. Also puts out 10% less wattage. Is that important to you?
We used a truck camper with a 2800 LPG generator. The TC did NOT have A/C (in Alaska we didn't need it...) but I can say it started and ran well for microwave, coffee maker etc.