Is it possible to just remove the wheel in order to lubricate these points? Or, must I remove the springs and shoes? Thanks.

Ah, so even when the wheel is not moving the shoe to drum backing plate interface can still squeak?

2003 Vibe. Without turning the car on and the car is in park - if you press the brake pedal there is a squeak coming from the rear wheels. What is the most likely cause of this type of squeak? Is the solution simply to grease some mechanical brake part? Thanks!