i just bought a 35ft keystone laredo 303tg TT. it has a dry weight of 7500lbs and loaded with all my gear it is about 8500lbs.i need help in deciding on if i should buy a gas or diesel truck.i am looking at the new ford 2011 f250 crew cab 6.7 powerstroke diesel but the salesman at the dealer said that i dont need a diesel and the gas would do just fine since its rated to pull 12000lbs..ive been reading threads and some say gas is good and some say diesel is good.i dont care about the extra money for the diesel since i would use it for plowing in the winter.i just dont want to kick my self in the rear end later if i go with the gas.please help.