Definitely try to find the "Lact-aid" type products in your local drug store--they are usually located near the tummy meds. They come in different types including chewable. I am completely lactose intolorant and ice cream addicted! I never go anywhere without my Lactaid. Experiment with the amount needed for certain things like a glass of milk or ice cream bar before you go so you won't have upset tummy problems while there. I need different amounts of the pills depending on how much and what I am eating.
FYI--they also sell Lactaid drops that you use to treat regular milk at home. Follow the package directions. They drops are expensive, but usually it is cheaper to use them and treat your own milk than to buy Lactaid milk--$$$$! You can't take the drops with you because they need 12-24 hours to work. Also you can treat one gallon of milk and the whole family can still drink it--no need for a "special" milk.