I like to fit 16 pancakes per freezer bag. Here's how I do it..in pictures.
Tear off a long piece of waxed paper and lay it on a cookie sheet. (The waxed paper should be long enough that it hangs over the edge a little.)
Then you lay 2 pancakes on top, and then "accordion fold" after adding 2 more pancakes to each waxed paper layer. To fit in a gallon freezer bag, you can only go FOUR high (total of 8 pancakes.) You will be left with a section of waxed paper at the end.
Cut that section off. Slide the stack into your freezer bag. Add another stack.
You have 16 pancakes in a freezer bag ready to reheat and enjoy!