I use griddle stones to clean rusty or carbon-encrusted cast iron pans. The stones are the size of a large brick & may be found at most resturant supply stores for around $3. I break a new stone into 2 or 3 pieces & generally use up the entire chunk scrubbing a really cruddy pan or pot. This really does a nice job on old comals (flat-iron grills) that have spent a lifetime cooking tortillas & are really carboned up. In the past I have sandblasted old dutch ovens and frying pans as well. Any new (used) cast iron piece I find, usually at the Goodwill store, gets this treatment and then a re-season using olive oil and 2 hours in the oven at 425.
I have 3 footed dutch ovens that have lids with a lip to hold coals or briquettes that we use camping for baking only. Walmart sells a pack of 4 large round parchment liners that will fit any size dutch oven & really makes it easy for cleanup as none of the food actually touches the bottom or side of the pot. When it comes time to put the camping gear away, I just warm them up on the stove or in the oven (I have been known to use a weldig torch too), coat them with vegetable oil & wipe 'em down with paper towels or a rag before they go up till next year.
My personal observation about cookware is connected with the rise in alzheimers disease in the older generation - seems to me that aluminum cookware came into vogue just about the time my folks were growing up (dad is 88). Maybe there is no connection, but then again, I will use cast iron and not allow any aluminum in our house. John