Andy, I've lived in NM for over 30 years. If you are getting them roasted, you can freeze as is and they will peel beautifully (if well roasted) any time you want to thaw and use them. If they are not too broken up by the roasting process, I peel and stuff with slivers of cheese (jack or cheddar) from the stem end, then coat in flour, egg wash, and a flour/crumb mixture. Let sit a half hour to firm up the coating and pan fry in a half-inch of oil over med high heat till crisp and brown, hopefully before the cheese starts to ooze out. Drain briefly on paper towels and enjoy. Classic New Mexico Chiles Rellenos.
Next best is to peel, stem, and seed them and cut into dice. Saute some garlic and onions until translucent, add the chiles, season with oregano, cumin, and dried cilantro, add water or broth to the consistency you want, and you have green chile sauce for enchiladas, huevos rancheros, burritos, etc.
You can turn the sauce into green chile stew by adding ground lamb (classically), or beef.
Enjoy!
Lots of green chile recipes on the web. Try
http://www.elpinto.com/green-chile