I assume you mean the Coleman portable folding camp oven. I've seen it but don't have hands on experience. Amazon reviews seem good but note it's a little slow to heat and tougher to keep even in cold weather. At around $25, might be worth a try, but patience and it seems about 8" square is largest. If you go for it I'd love to hear how it worked. I'm inclined to stay with my JMO and, for car camping, the dutch oven with charcoal and a fire pit. Your set up would have been great if you'd have been able to put coals on top. Just an aluminum camp pot with lid and coals on it work great.
Just for kicks, a different stove stop approach, the BakePacker. Easy and quick and nice to have fresh baked things, but no crust or brown edge.
http://www.bakepacker.com/ Still, it beats add boiling water trail food if in the wilderness.