We spent 11 hours car to car, and only 6 hours climbing. I remember saying, I'll never go back. But I'm already thinking about doing another route. mountain project dot com has real good info too. 4 liters of water should do it. Leave 1 in the car, 1 at the base of the fixed line, and 2 while on the tower.
The best thing that could happen to this tower is for someone to rap bolt a set of rap anchors every 30 meters down the North face. That way tourists could photo your decent from Point Imperial, you'd be rapping in the shade, and you'd only need one 60 meter rope to do the tower. I noticed a growing number of new rap anchors in bushes on the South face. This is not good and can just clog the southern face with climbers and rappellers. The approach is the crux fo show.. Leather gloves, carrharts, and old gore-tex coat make it nicer. Good Luck!! And watch out for afternoon thunderstorms.