I freeze pies all of the time. I like to make my own crust. It can kind of be a mess so I make several pies or shells at the same time.
My crust recipe is 2 1/4 c flour, 2/3 c shortening (stick is SO easy), 1 t salt, and approx 1/4 c cold water. I mix all but the water till just mixed in a food processor. Add the water and mix until it makes a ball. If it doesn't make a ball right away I add another table spoon of water.
My mother used to get 3 pie shells out of this but her tins were small and she rolled it out very thin. She got the manual version of this from a Crisco recipe almost 60 years ago.
A pastry cloth and sleeve for the rolling pin make things much easier. Just add some flour and no sticking.
I put a layer in the pie plate, add the filling of choice (pre-cooked but cooled to room temperature), top with crust and crimp and pierce. I usually put it in a large zip lock bag - maybe wrap that with freezer paper if it will be there for awhile.
I get rave reviews on my pies so I guess this works. I ususally have cherry, apple, and mince pies in the freezer plus a few empty shells for chocolate and lemon cream pies.
I put the pies in the oven frozen and usually rim the edge with foil or one of those ring toppers to keep it from getting too browned. It's done when the top is browned.