It is possible to climb Crosson, traverse to peak 12,472 (the next peak to the west), then descend west down the ridge to the Foraker Glacier. This was the path that was taken to climb the route Full Circle on the north face of Foraker. The approach is apparently safe and straightforward. Climbing up and over Kahiltna Dome lands you on the Straightaway Glacier, which doesn't connect with the Foraker massif. Flying to the Foraker glacier is not allowed because it is in the national park (and probably not even possible for that matter.) The closest fly in point on the north side is 40+ miles from Foraker, on a small lake (I forget the name.)