Rear brake makes noise

Make sure the car is in park also you can put somthing like a small block or a wood behind the front tires take the emergency brake off the drum will not come off with emergency brake on then you lightly tap on it with a hamer all around it should come off some time if there is rust you need tap on it hard good luck

Brake drums are an old idea that was great in it's day. Disk brakes are easier to work on, inspect, and have better stopping power. This is why they are standard on the front end.
That doesn't mean to change them out or anything, this is an easy fix.
First park the car on level ground, and block the front wheel on both sides of the tire opposite the rear tire you are removing.
Put the car in park, or the lowest gear it has, but do not engage the emergency brake. (It sounds like you had the emergency brake on when you tried this last.)
Jack up the car on the side you want to work on and put a block under the suspention or the tire.
Lower the car onto the block, and make sure it is still off the ground.
Remove the tire and set it aside.
Try to work the drum off. If you are struggling to get it off still then give it a swift tap with a small hammer. Be careful not to dent the outer portion of the drum. You could place a small piece of wood on the drum before striking it. Work your way arround the drum with the hammer, and keep trying to free it from the brake shoes til it comes off.
If you have a camera get a picture of how it looks when drum is removed. This will aid you in reinstalling the new shoes.
There is a piston that forces the shoes outward when the brake pedal is pushed in. it comes out both sides of the piston to work the brakes.
There is a little wheel that looks like a sprocket inside. This little wheel pushes these small bolt looking things apart little by little as you use you brakes in reverse. it maintains the functionality of the brakes as they wear out. An arm moves the sprocket looking wheel a notch or two each time brakes are used in reverse. This will need to be reset if you change your brake shoes. It will be difficult to turn the wheel but you need to make it shorter. Turning it one direction will make it longer, the other way makes it shorter.
A spring holds the apparatus in place. Use plyers to get the spring off.
The emergency brake cable also goes to one or both of the shoes and has a lever attached. Remove it carefully, and install the new shoes the same way you take the old ones out.
It is implrtant to look at the inside surface of the drum before reinstalling it. If it has any scarring at all take it in to get it turned. Checker, Kragen, or equivelant will do this for a small fee.
Presto.

I found a forum here where people are talking about getting brake drums off similar model cars.

http://chevroletforum.com/forum/showthread.php?t=3933

Not sure if it will be that much help though.
From other things I have read there doesn't seem to be any trick.

Does the hub spin free or are the brakes bound to the drum?

Hope this helps.