I have been traveling with an inflatable wedge pillow for a few years now. It's not the perfect solution (think about how it is to sleep on an air mattress), but I haven't come up with anything better. I make it more comfortable by using all the extra pillows in the room. I went with one of the cheaper pillows (around $30), I've since wondered if getting a more expensive one would pay off.
If you want to go this route, possibly you could try ordering it and having it shipped to your resort, or find someplace that will overnight it to your home before you leave.