I used to travel around conventions with my business and had a whole setup for cooking that went with me. I had a microwave, an electric kettle, and a single electric hotplate. I'd make soups, some convenience-type foods, reheat leftovers, popcorn, etc. No, I never made anything that smelled strong and I never left anything unattended for safety reasons. I also never wanted to use the hotels' stuff for preparing my meals for the reasons in this thread. Sure it was a bit of a pain to pack/set up, but well worth the savings of not eating out, especially toward the end of those days when the economy crashed and took my business with it.
We also stayed in a 1BR at DAKL for 28 days and heck, yeah, I cooked there. The crockpot and the George Foreman were my best friends.