Around here, we call that going to Duluth by way of Mankato. There is nothing difficult to pulling one wire into anywhere in an RV. The ground can be found anywhere along the frame.
Most of these wiring schemes I come across on the Forum where members choose to add to the difficulty rather than make it simple are a result of lack of wiring skill. Yes, I was there once. For LED lights, the wire size can be small and the power wire can be lead from the 12V distribution center, the battery, or any other spot that has 12V available. Research into wire ties, holding accessories, and terminations may bring good results.
If a hole or a wire is anathema, buy some battery operated puck lights. They work as well as any other configuration.