We have had the same problems/feelings. Everyone wants the MKT's setup at events and us to cook food, but a lot of people simply don't realize (and maybe in some cases don't care) how much work it is. It is not just setting up the MKT, but getting all the food/supplies (usually takes an entire afternoon to go buy all the food/supplies), then the cooking, cleaning (after every single meal), then by the time you are finished cleaning you have 15mins till you have to start cooking again for the next meal. Then at the end there is the work closing it back up and putting everything away. And after that we usually have to open her back up again a few days later to really clean it up again (usually with a hot-water pressure washer) to make sure it is really sanitary for the next event.
The last event for us is what broke the camels back. We were told we would cook two breakfasts and one dinner and just for the volunteers with the military vehicles. Once we arrived the organizers told us that we would be cooking ALL the meals (2 breakfasts, 3 lunches and 2 dinners) and would have to also feed an extra 200 people. We had bought food just for what we needed (with a little bit extra just in case). We were in the middle of nowhere as well (about an hours drive to the store). Organizers told us they didn't care and that it wasn't their problem that no one had told us that things had changed and just drove off on their golf cart with "more important things to do". Even after we went out of our way to do all of this, the organizers refused to help pay for the extra food and we spent our entire weekend baking inside of the MKT (with the ovens running and the summer temps it was hot as h ell in there) cooking for people. Never had a chance to get out and see anything. Naturally a lot of people who offered to help us could never be found when we needed them, but they were the first in line to get their free food. We did have a few people that helped us here and there which we really appreciated, but they had to leave after a while as they hadn't originally planned to stay all weekend. That whole situation left us very jaded. Especially when it wasn't the first time it happened. In the end we calculated it cost us over $600 in our personal money and a completely lost 3 day weekend.
We concluded it simply wasn't worth the effort after that. We will bring it out to events to show it, but other than cooking for ourselves (or for small events) we will not be cooking for the masses anymore. After volunteering for events for the community and other activities over all these years, we want to actually see the event from somewhere other than the other side of the service table. We love to help people, so this was not a simple decision.
You got a nice trailer there. Very hard to find one with a good set of canvas all over. I am sure whoever buys it will be happy with it.