The worst thing you can do is microwave them.

That will kill any crispness.
Your best bet is to fry them, drain them on paper towels, and then keep them in the oven on a wire rack over a baking sheet. The less contact they have with a surface, the crisper they will stay. And unless you have to hold them for hours, no, they will not dry out, especially if you keep the oven at a low temperature (say, no higher than 200 degrees F).