Hi. You don't need reservations to get in or to the bells Concert. The only thing with a line is to enter the estate "el retiro" but all the other places like the garden, Kitchen garden, hammock hollow, etc just walk and enjoy. There's a restaurant at the entry or you can picnic as well.
Sundays are a great day to go but, it tends to get busy. You need tickets for concerts which can be purchased in advance online or at the office or at the gate the day of. Don't quote me on that. Not far from Bok Tower are the restaurants "Crazy Fish Bar and Grill" and "L'Incontro Italian". "Carter's BBQ" is a good place and is just down the road from Bok Tower.
No reservations required. On Sundays live recital at the tower 1pm & 3pm. Lots of benches or #13 on map from visitors center has a live video feed to watch him play!! Cafe across from visitors center is open until 5 pm. Wonderful sandwiches, salads reasonable prices. Tables and chairs outside.
There is a beautiful spot for a picnic lunch near the tower overlooking the grounds. There is a cafe onsite that has some great selections and fairly priced.
Thanks! Your answer is awaiting moderation.