Gah, can't believe I've wished you back - you're no help, no help at all! 
Yes, the fire in a tent thing. Have thought about it for so long, but will be super strict on it (for what it's worth, obv). E.g., carbon monoxide and fire alarm, fire extinguisher, which we always have anyway, and knife (folded, obv) under mattress. Will also have ds sleep further than us from stove. Not that the minutes available should things go wrong is that much, I know, but every little helps the nerves. Have stayed in yurts with stove before, so at least know that he's old and scared of me enough not go go close to it etc.
Main reason, on top of the cool factor , is that we wished to extend the camping season a bit, and I don't want gas in tent. Also found place to go wild camping (with permission), so nice to have stove. I've got a long list of excuses. 
Haven't made up my mind about seal when not using. One option is to make a flap thing, or could just get dh to make a silicone circle of same size to bolt on when not using. Both involve unscrewing the thing (technical term) though, which I'd rather not. So might see if I can think of better solution - perhaps some cup thing. No, not a coffee can!
Trailer. I fear not even dh loves me that much, would be a push too far. So, much to my bank manager's delight, I think this will be it for the foreseeable future. No, really, it would.