Hi everyone: Been awhile. Sorry about that.
I have an AGP, but in many ways it's more like an IGP, other than the plumbing. So I don't have to blow out lines and fill them with antifreeze, I just remove them. But I have to blow out my solar panels and all of their lines.
I use a mesh safety cover and always have as I'm not directly under any trees. I do follow the 60 deg rule, mostly. In the fall I wait as long as I can for the water to get at least close to 60. By then I've shut down the solar panels and blown them out, and plugged their returns. I clean and shock the pool up to the max for the CYA level, then add a quart of Polyquat 60%. I wait 48 hours for the FC to drop (a reaction to the Polyquat) then boost FC up to shock levels and close. That means lowering the water below the return, or even the lights, plugging the low drain, the skimmer, the overflow and the return.

I can then remove and drain the plumbing behind them. I have quick-connects or quick-connect ball valves everywhere. I disconnect them, dry and lube each o-ring, then put each one in a zip-lock marked with a sharpie. The plumbing is stored in the basement where it's warm and dry, including the pump. The mesh goes on and I'm done till April.

Up here, we get a solid block of ice, sometimes well over a foot thick. When this is all gone, usually in April, I begin to open. IF I get to it that early, I have little or no algae and a fairly simple clean up. If I am later, I have to shock the water to kill the algae that starts. Since my liner is now 11 years old, I don't worry about bleaching it. It's bleached already!