Try soaking your feet in warm water. Either a hot tub or fill the bath tub in your room and soak for a while. Advil can also help.
I find that my feet hurt the most if I have to stand in one place for a long time. WoC for example kills my feet between standing waiting for the show to start and then standing during the show.
I put something similar to blister pads on the bottom of my feet this trip and that really helped as well!
My first trip my feet were dying but this time they were much better!