KU fans won't be there so street parking should be plentiful if you don't mind a walking a few blocks. Living down here, I always try to park on the street near 11th or 10th and Washington, then walk over. This takes you right past the team hotel (Kansas City Mariott Downtown) which is always a good stop after a win - plenty of 'Clones loitering in the bar after games to welcome the victors in! The neighborhood is good and it's easy access to I-35.
A few years back a some buddies of mine and myself parked in a random neighborhood and waved down a guy driving a beat up truck. We told him we'd give him $20 to drive us straight to P&L. All four of us laid down in the bed of his truck while driving downtown KC. We beat Kansas shortly after and won the tourney.