First I'll have to say that I don't really cook over an open fire that much except for dutch oven cooking. I'm a stove guy. I find it too hard to regulate temperature and the pots are such a dirty mess to deal with.

If you're car camping then take a look at the Open Country cookware. They're not the best, thickest material, but they pack well, come in sizes suitable for most needs, and are convenient. I prefer the 6-person deluxe camp cookset since it has more sizes of pots. Big pots are great for boiling water, but smaller pots can be much more convenient.

For cooking over an open fire it is hard to beat cast iron dutch ovens and fry pans, whether used as ovens (over/under coals) or as a pot (hung over the fire). For that I'd recommend the Lodge dutch ovens sized to meet your needs.

I like this dutch oven gear site: http://www.chuckwagonsupply.com/catalog.html

If you want something smaller - more personal - then take a look the GSI Outdoors Bugaboo or Hard Anodized Extreme cooksets sized to suit your needs. I use the Bugaboo pots/pans.

For open fire cooking I do think cast iron is the way to go.