you can go relieve your bladder anywhere when you need to--that is if the nearest restroom is 4 miles and you're in a hiking trail. No excuse anywhere else...
This great place to hike. The terrain is pretty good, has little hills, but mostly pretty even. Along the trail is a stream that gets filled up when it rains. So do not wear running shoes. It may get slippery during numerous stream crossing. Some vegetation I recognized are: bananas trees, Java plums (invassive), guavas, ginger flowers, bamboo grass, mangoes, palm tree (the one native to Hawaii)some native tree-can't remember the name )a lot of native grass:)