if you make du'a to any human being, alive or dead, prophet or saint your are a kuffar, disbeliever, because you've associated a partner with Allah, who has no partner, and is above what you associate with him.

regarding pilgrimage:

"(..) Do not set out on a journey (for religious devotion) but for the three mosques-for this mosque of mine (at Medina) the Sacred Mosque (at Mecca), and the Mosque al-Aqsa (Bait al-Maqdis) (..)" [muslim hadith 3099, reported by Qaza'ah <- Abu Sa'id]