Wharton, Northwestern bad test scores but good experience.

Hey guys,
How much do top B-schools care about experience for their Undergrad program?
The reason I’m asking is because my scores a subpar BUT I participated in a 3 day-workshop (extreamly tough to get in) offered by Goldman and Bain regarding Investment banking and Mgmt Consulting.

Also I studied at one of the best b-schools within my country while still being in HS, which led to an incredible recommendation letter. (One of the reasons why I was accepted for that workshop)

Would that compensate an ACT score of only 29-31?