I don’t know where you are in your treatment, but I would advise you to be very careful going on vacation. I went on vacation to LA about a month ago and the only way I survived was because I cooked a LOT in advance (brought granola, bread, etc.) and I stayed with cousin, so I could use his kitchen. I cooked everything and carried food with me everywhere.
Can you stay somewhere that has a kitchen you can use? You could also purchase a cheap plug in kettle/pot when you get there to boil veggies in.