I really don't see it as a flop, but I'm sure you'll perfect it.
I never thought of using a steamer, my son bought me one that I hardly ever use, much to my shame! I'll wait to see how yours turns out before I try it!
Mom's camp 'oven' was dug into a little bank bordering our camping site which was almost on the beach. The soil was very loose, it also was right by the built-in BBQ.
Enjoy experimenting 😉