You'll probably want to shock the pool and then let it drift down a bit and then maybe add a double dose of polyquat 60 and put your filter on circulate for a day or so. Then bring your chlorine back up a bit before covering it but not to shock level. You don't want to cover a pool that is at shock level as the fumes can damage the cover. I would also take the pH to the upper end of normal like about 7.8. Having said that, let's see what Ben recommends. He'll give you the best advice in this situation. I'm going to ask him to take a look at your thread.