Joe, I have beat on drums with a sledge hammer to loosen them, just hit on the flat surface to avoid warping. Have always worried about cracking them but so far no problem. Another member posted that you can also put your rear end up on jackstands, remove the wheels, put it in gear then apply the brakes in forward and reverse while the drums are spinning. I've never tried this but it seems like it should work, other members have reported luck with this method.
Darren, a qt of PS fluid will get you two changes.