There is a mitzvah, or at least a strong minhag, to eat warm food at one's Shabbos day meal. What about when traveling?
Must one arrange to always have warm food on Shabbos while traveling, or is this something that one could be lenient with while traveling?
It may be possible to, say, always bring a crockpot with you when you're going to be somewhere for Shabbos without access to warm food, but would this be required when this would be inconvenient?