We did both on our last trip and couldn't imagine skipping either one. For us, we spend more time at TL mostly because it seems more relaxing and playing in the wave pool. We typically only spend 2 - 3 hours at BB because it doesn't have the same relaxing feel and quite honestly the chairs are so cram, packed in front of the wave pool it drives me nuts! You could definitely do both in one day, but we prefer to do just the morning/early afternoon then go to a park in the evening.