Camper Dome light location

Hi guys,
Just got a new DCLB 3 weeks ago. I just picked a Snugtop camper. Just wire third brake light.
I could run wire all the way to the battery with in-line fuse but I don't want to do that if there is an easier way.
For the dome light, where do most people tap it?

 

You can tap into the rear brake lights with some taps or use below for a nicer option

Plug and Play Brake Light taps | Tacoma World

 

I already did the brake light. I am looking for dome light.

 

Ah, Gotcha.

maybe the cargo light might be a better option.

Plug n Play Rock Light Harness with Courtesy Mode By DSIM Solutions (Now in Stock) | Tacoma World

Like this but instead of rock lights you could hook up a dome controlled by the cargo switch

 

The cargo light in my shell gets it's power from the tail lights, so it only works when the tail lights are on. It's a bit inconvenient at times, but it gaurantees you won't leave the cargo light on and kill your battery.

 

I tapped the dome light to the cargo bed light.
The switch is in the console. I plan to tap it to the trailer Aux 12v, but then I have to run longer wire.
Cargo bed light is already there.