IMO get a gas instead of a Diesel and 2 x2 unless you really need 4x4 as this will save maybe 1,100 lbs or more of truck ( My numbers are out of date on that--confirm with newer trucks) weight that you can now use for more camper weight. OTOH the reasons given above for Diesel might apply to you. Depends.
What jacks are on that camper? If you got a dually truck, you need dually jack mountings if not there now.
Get a truck with a back seat not a regular cab. You need space to carry more stuff than the camper will hold.
Besides the weight on the back tires and all that to consider, if you overload the truck, it will be hard to stop and keep the speed down when going down steep hills. Not fun!
A mechanical inspection before buying is well worth it. Low miles does not mean it hasn't been worked hard. EG, watch out for shavings in the rear differential. You can get a "kit" for that, but it costs some. That's just one thing for the inspection to do for you.
If the truck already has a towing package, you get the 7-pin for the camper's lights. Maybe a transmission cooler too.
Compare the bed rail height with your camper box height--you might need some 2x 4s in the bed to sit the camper on and longer chains to the belly bars. (You have to get those put on the truck)
