Another vote for Stick and Tin or aluminium siding over 2"X2" wood studs.
I've personally see about 2 out of every 3 fiberglass laminated trailers have some sort of delamination.
Plus many laminated trailers also have laminated floors and roof which is a big no-no in my book. Soft/weak floors and weak roofs scream short term disposable unit.
Plus Stick and Tin is so much cheaper for so much more.
If you want better rated insulation, just get the winter packages and you'll have that covered.
I think more and more makers are going back to Stick and Tin with the every increasing failure rates of laminated walls.
I went camping last week and every Travel Trailer there was Stick and Tin. 1 5th wheel and 1 motor home was laminated, but on those types, you rarely have a choice of anything but laminated build.
Good luck on your camper choice.
2019 Ford F150 XLT Sport, CC, 4WD, 145" WB, 3.5L Ecoboost, 10 speed, 3.55 9.75" Locking Axle, Max Tow, 1831# Payload, 10700# Tow Rating, pulling a
2020 Rockwood Premier 2716g, with a 14' box.
Previous 2012 Jayco Jay Flight 26BH.