"I'm leaning towards pulling her out completely and taking her home for the winter."
Wont do a damn thing , the systems that need Freeze protection will still require protection , unless you keep the boat under the living room table.
A good flush will get the pink stuff gone , esp if you use the taste remover by Camco, the folks that make much of the pink goo.
My suggestion is belt and suspenders.
Run pink goo thru the FW system till you get good pink color , let it sit O'nite , then blow all the pink out and re capture it.
Toss it in whatever is left in the holding tank , as that's not fun to blow out , and can seldom be pumped really dry.