what Jim said, I have never been to a pilgrimage, except to local shrines encountered on family vacations, or within weekend driving distance, and I envy you. I want to go to Guadalupe, to Fatima, then Lourdes. SIL did your itinerary in college (he is of Polish descent) and he says it changed his life.
regard the pilgrimage as a spiritual exercise, not an excursion. In other words, accept any of the inconvenciences or lacks in the accommodation, food etc. in a penititential attitude, as part of the experience. be open to new experiences and ideas, and non-judgemental about the culture you will be encountering. Pray, perhaps a novena, before you start that you remain open to the workings of the Holy Spirit during this wonderful experience.