I'm going to a trip, what should I do?

Ok, so I am in grade 7 and were are going to a trip for 3 days on February 10, and I always get my period on the 9th of each month. I don't want to leak my pj's or have blood run down in the shower, on the trip we are going to be hiking and doing cross country skiing. Will it be a bad idea to go if I have my period? Cause it would be really embarrasing if I leak on the bed or in the shower. Serious answers please, and thanks a lot!! <3 :D