If you just need to change the gaskets you may not have to get it all the way out; last time I took mine out my less-than-hundred-pound wife got dragged around the garage like a steer wrestler, hanging onto the tank for dear life while I tried to extract the bladder. I have to admire her tenacity. I hear baby powder helps (on the bladder, not the "assistant" )...
Sprained my shoulder putting the new bladder back in; that top plate hole is smaller than you might think.