Bill welcome to the show. There are a lot of helpful folks here. We don't look for reasons to belittle people here like you find on the other forums (don't take kindly to those who make us look bad either).
Hmmm, need to be talked out of a camper huh? Seems like a familiar problem. I camped in a popup as a kid. Loved every minute of it. When I talked my wife into giving camping a try it took a while. Tent camping was definitely out. So we talked "campers" and she was in.
Now, in my head I saw a popup just like what we used to enjoy. A place to cook and sleep. Use the comfort stations for showers and restrooms. My wife saw basically a mobile home, full fridge, kids each have their own room, full kitchen, full size shower/tub, etc. So we had to do some compromising. We met in the middle on a model that gave the girls their own room with a slideout for more floor space. It has an indoor and outdoor kitchen so if combined she had a "full" kitchen. She still wants a bigger shower (typically only in a 5th wheel) but it gave us all what we wanted. My wife is a germaphobe. She does not wish to use the comfort stations and will not sleep in hotels as she has no idea what critters are living in the beds. Thus, the resorts and cabins were out unless we bring our own sheets and pillows (yes, she is that determined).
This bigger camper did require a bigger truck, thus the F-250 diesel. Now, here's the thing on diesel vs. gas. If you ever tow a trailer/camper with a gas burner and then pull it with a diesel you will not want to pull it with the gas burner again. The extra power of the diesel just leaves you feeling more comfortable on the road. You can accelerate faster and smoother and get better mileage, plus the added weight makes for better handling of heavier trailers. Yes, it costs more, about $10,000 more, I can justify the cost since I have land that needs regular tractor work to maintain. This means being able to pull big tractors on a trailer that I just can't do safely with an F-150 or similar. To offset the wear and tear on such an expensive upkeep truck, I still have my 1997 Toyota Tacoma to drive back and forth to work or to run simple errands. Some people can't justify the extra cost of the diesel, due to needing the same truck for everyday use which the diesel is not practical for. I will not argue with them on this point as they are correct to not be able to make the math work in that circumstance. For them, the smarter choice is to go with the gas burner.
I will suggest one thing though, if you get a trailer, and intend to make long camping trips, I suggest an auxiliary fuel tank to cut back on the fuel stops. It seriously helps make up some travel time and reduces the stress and headache of getting in and out of gas stations/truck stops.
P.S.
Quit being a lurker. We like to hear input from people, especially if it pertains to camping. We need your side of the story too. Your significant other has been a big help to others on the Dis for years so now it can be your turn. For us guys though it can sometimes be like watching an episode of Raymond or even Married with Children. We all like to joke and go back and forth at one another.