Hey guys, I used a smaller pack, but it too was the cross the shoulder style. It was by Heys Luggage and they had a ton of bright colours to choose from. It was about twenty dollars. It is smaller than a knapsack, but expandable! It had the cell phone holder that sat on your front. It has a "wet" pocket for wet things or wipes, which was fantastic. It had a zip up little compartment that had a mesh thingy. When you un-zip it you can put a large water bottle in there. Several compartments inside and expandable. I just loved the thing. It is by Heys Luggage.
Happy trip everyone!!