There is no way I know of to acclimatize to altitude other than being there. Being fit before you go will help, but some of it is genetic-big lungs, big heart.

Real acclimatizing takes time. I know this because I used to live at 11.5K ft. and regularly went up to 13.5ft. and higher on occasion.

I have no idea how high you will be, but I have been up to 7.5K in Yosemite skiing with no problems straight from low atlitude. Taking it easy is a good idea. I would also take along something for headaches, in case you get one from altitude. Be sure to drink plenty of liquids. Dehydration is one cause of altitude sickness.

btw, the only real cure for altitude sickness is going down to a lower altitude. There are some other threads here about altitude sickness, plus I am sure you can find more about it by doing a Yahoo or Google search.