Mkish,
I have been down the same road. As far as diesel v. gas, my decision was easy. I chose the diesel for the mpg and the low end torque. Now, in regards to Fords diesels there are a few models that you have to stay away from IMO. The 6.0(04-07 model years) was considered to be a high maintenance motor. They are know as the pukers. The 7.3 is still considered one of the best motors in the diesel class. If you are planning to buy a new Ford, the 6.7 is getting great reviews. I just got a new Phoenix Camper from Rob at Coyote RV and the combination of the truck and Camper are great. My camper came in around 1500 lbs, which my 7.3 doesn't even know it is there. The only upgrade I will be doing to the Ford is bigger rotors and brakes. My stopping distance has increase and with the size of my tires, this would be for safety.
The camper itself is perfect. I can sleep 4, or in my case 3 and my dog. If you have any questions what so ever, please pm me.
Greg