The first thing that truck needs is wider mirrors, you can’t see around a camper with the ones it has on it.
2nd Gen Dodge tow mirrorsThey’re later model flip out mirrors that bolt to that ‘99.
You need them.
You can get manual ones or electric and heated.
If you add heated ones and it didn’t have them already, you’ll need the heater control panel that has the switch and circuitry. Available on eBay.
If you add power adjustable mirrors and the truck didn’t have that already, you’ll need the switch for that, also available on eBay. It mounts in a hole on the driver for that will have a cap over it if not originally equipped.
The wiring is usually already there in the truck.
Everything just plugs right in.