I am going on a trip next week. I will be driving, so weight is not a big issue.
I plan to take a couple of Gold Dollar straights with me as I do not want to risk losing or damaging one of my good razors.
I will take a tube of Cremo shave cream and a synthetic brush. In a pinch, some of the boutique soaps at hotels do a decent job of creating a shaving lather. That may not be the case at cheaper motels.
I will take a cheap plastic cereal bowl for lathering, but a coffee cup, even a paper one, can be used.
I won't take a hanging strop, but I will take along a strop made from leather glued to balsa and a CBN pasted strop as well. Thus, I should be able to keep my straights sharp throughout the trip.