HI Changeus , welcome you come to the right place here mate we have the master of sneaky Hidey nothing to see here Mr ! he goes by the name of Kristijan he’s your man who has done just what you want to do , just be mindful that the boot should be sealed and with no way into the cabin for any escaping gases .
Top of the page is a magnifying glass there are a couple of builds he has done the wood gasifier is not as stealth as the charcoal one but worth a read to get idea’s , i found the links for you save you searching .