You do have to be more mindful of your fire when using an Aluminum DO, and definitely avoid extremes. If your Aluminum pot is full of food, especially with a fair amount of liquid, then it should be okay. Never put an empty aluminum pot over a cooking source at camp, either propane or embers, or it can burn up, melt, or at least warp.

Generally, aluminum DOs are more tempermental when it comes to baking, like biscuits, bread, or desserts. They tend to cook unevenly, so I use them for foods that can tolerate more of a temperature differential, usually stuff with a lot of liquid in it, like a stew or a cobbler. If you do bake in one, you have to tend the pot a lot more tediously.

PS, pizza made in my 16" DO is exceptional, at home or in the big woods.