The questions for the OP start with trailer size, which also then dictates Truck size, and drivetrain.
One person alone even with some dry camping can get by with a 25' box and a half ton truck pretty easily. ie; a F-150 with a tow package and either a 5.0 or 3.5 Ecoboost.
Mid lever trailers for example could be 2520 Passport models or 223rbs Coachmen.
Or you could look for heavier trailers, with longer living spaces, and go to 2500-3500 trucks with or without diesel powertrains.
It's all up to your taste and wallet depth.