We have used aluminum Swiss stove in our Troop for many years. On one occasion our consolidated supply of Denatured Alcohol got compromised in transport. So for the week end we used dried branches in the stove housings. WOW! It really worked well. In many ways we got more heat out of them. Our Swiss stoves gave us about 15-20 min burn time when in the stove housing. Using small branches we got at least 30 min of heat. One of our boys used branches with his Large German EZ Bit type folding stove and it worked well too. Sure, there was carbon residue on our equipment but it all cleaned up at return. I would suggest having a stove that uses Denatured Alcohol knowing I could use dried branches as a back up.
Swiss Army Mess Kit and Trangia Stove
Amazon: Folding Stove