We know that God grants special graces on those pilgrimages that are done for His greater glory. Especially when these are done in Shrines dedicated to the Mother of Jesus Christ.
St. Louis de Montfort once said: "Therefore, the more you gain the friendship of this noble Queen and faithful Virgin the more you will be inspired by faith in your daily life (…) For it is a lively faith animated by love enabling you to do everything for no other motive than that of pure love. It is a firm faith, unshakable as a rock, prompting you to remain firm and steadfast in the midst of storms and tempests. It is an active and probing faith which like some mysterious passkey admits you into the mysteries of Jesus Christ and of man's final destiny and into the very heart of God himself. It is a courageous faith which inspires you to undertake and carry out without hesitation great things for God and the salvation of souls (…) Finally, this faith will strengthen you to resist the devil and the other enemies of salvation" (True Devotion, n. 214)