Charles Coushaine sharaes how he added a USB port to the outside of his Ford F-550 and Chalet DS116RB rig.
Tested: Happier Camper HC1 Studio Review
Camper Van, Motorhome 230V + 12V + USB Panel – Camper Interiors
Adding USB charging ports and 12v outlets to an RV
How to Add USB and AC Outlets to your RV - Where YOU Need Them
Adding A USB Port To A Camper Exterior
3.1A Waterproof Dual Port USB Socket 12V / 24V – Camper Interiors
Ep. 293: Adding USB Outlets to Your RV
4-port StarTech.com 4 Port USB 2.0 Hub - USB Bus Powered
RV Dual 12 Volt USB Charger Socket Black Recessed Mount - RecPro
Adding a combo USB 120VAC Outlet to the dinette in my RV.
DuKabel USB Audio Adapter, TRRS Mic-Support USB
Camper Van, Motorhome Single 230v, 12V or USB Socket & Surround
Adding A USB Port To A Camper Exterior
Nimble & Robust: Taxa Outdoors TigerMoth Overland Camper Trailer