Question: What of the one performing Hajj being unable to find a place (to rest) in Muzdalifah during the night of ‘Eed. What is the ruling?
Response: Whoever is unable to find a place (to rest) in Muzdalifah, then that which is clear is that there is nothing required of him because all obligatory acts are ‘forgiven’ if one is unable to perform them (subject to Islaamically acceptable conditions).
Shaykh Ibn ‘Uthaymeen
Fataawa al-Hajj wal-‘Umrah waz-Ziyaarah – Page 101.fatwaonline.com