The only way to get an appropriate appreciation of the full estate would be with a tour guide. The full day is the best way to see as much as you can, inside and out.
The best way to see the tower itself with history of the tower and the city. Nick our tour guide was a very informative guide. Sunset was a great time to see the city and the tower.
Very interesting inside look to this world renown brewery. Well worth the tour with your pint at the end.