we lived in a bell tent last year for 10 weeks, spring and summer. We borrowed a frontier and used it virtually every night (we were quite high up), with some very frosty nights early on. Basically it was great. I am pretty sure it was a 100 quid job with some additional flue sections and a spark arrester. It was a bit smokey to start until you get a draw going, then fine. The firebox isn’t massive so there’s regular restoking – smaller split sections of log were much better than larger chunks. As it is thin steel the heat can drop away, we just piled bricks on it and got them hot for when it finally went out overnight. I’d buy one if I didn’t have the chance to borrow it again.
We cooked on it, boiled water, dried socks on the rails. Couldn’t fault it
It is possible to dint it but it was pretty robust, and i’d say fixable within reason as it is very simple