Hey, I like my cast iron cookware also. I just have to carefully choose when/where to use them. Upstairs I have 5 or 6 dutch ovens (including an itty bitty 7 inch one), and around 8 cast iron spiders (just like a dutch oven but with a skillet handle instead of a bale handle). But those cast iron spiders are mostly post Civil War, and work best around the chuck wagon or in the lineshack. Ditto the dutch ovens.
That's why I and several other people have been playing around with something called a Tourtiere. It is what the French used to bake over an open fire with before the mid 1800's and the coming of the dutch oven. It is basically a sheet iron or sheet brass pan with a high/tall cover with a flat top. You use it just like you would a cast iron dutch oven - including putting coals on the cover (some were made with a little lip on the top to help hold those coals on top).
Last spring I sent two down to the Colonial Trade Fair and Rifle Frolic at Fort de Chartres. They worked well and I received a bunch of feedback/critique of them. Back in September I sent three of the new "mark 2" versions up to the fur post gathering at Pine City MN. They worked great. One lady loves her's so much that she baked 7 pies and a double layer chocolate cake in hers - just over that weekend. And she also made 2 meat dishes in just the bottom part as well. It sounds like she was a pretty happy camper that weekend.
So I keep looking around for more documented cooking gear to ... tinker with.
Enjoy your cast iron cookware. Just check the event rules/guidelines to see if it is acceptable at the places you wish to attend. I enjoy mine at home (like every morning), and at the cowboy/old west events I get to.
Mikey - that grumpy ol' German blacksmith out in the Hinterlands
p.s. Here are a couple pics of those Tourtiers. These are made from sheet iron. The one with the legs is the "mark 1" version, the other is the "mark 2" version. The ladies all preferred no legs. They said they could then just put it on the coals or a trivet, but could also then use it on a grill or a braizier.
That little coil of iron rod inside them is an internal "trivet" - to set your pie pan on so that it doesn't set right on the bottom pan and scortch.