I personally would not buy a truck camper mostly because a truck already has a high center of gravity making them unable to handle as well as cars, but now you're going to increase that center of gravity a lot more making the truck unpredictable in handling; with that higher profile your MPG will suffer vs a trailer. I guarantee you that after you had a truck camper for a couple of years you wish you never bought the stupid thing. Plus travel trailers about the same square footage as a camper top is a lot less expensive, this means you could afford to buy a larger trailer. It's also a lot easier to connect and disconnect a trailer; you have limited storage space.
Of course there are advantages to a truck camper, there is no registration fee since it is part of the truck, takes up less space, easier to park, less intimating to drive until you have an emergency.
Anyway instead of me banging the keyboard like a raped ape just read this instead then figure out which suits your needs better:
https://camperreport.com/travel-trai...-cons-to-know/