WILKES-BARRE —When he was designing the set and costumes for the 2003 Broadway production “Long Day’s Journey Into Night,” it wasn’t difficult for Wilkes-Barre native and King’s College graduate Santo Loquasto to dress Vanessa Redgrave and Brian Dennehy. But it was a challenge to get Philip Seymour Hoffman, who was rehearsing the part of their son, to wear the right kind of tie. “Phil would go out the back door and I could never catch him,” Loquasto said last week during a visit to his alma mater, where he accepted an Alumni Award for Outstanding Professional Achievement. “Finally, one day I went down the stairs with him,” Loquasto said, waving his hand in the shape of a spiral staircase.