I agree, have both. You don't have to stay in one place just because you're in the pool and you don't even have to stay in the pool. But it's great to have the option of the pool because you can always get out if you want more space to move around. I planned a water birth, but actually spent most of my birth bouncing on a birth ball and walking around. I did get in the pool for about 30 minutes, but it didn't really feel right, so I got back out, walked up and down the steps (had a home birth, so in my house), and just stopped wherever I needed to push. I found moving around felt better at the time, but you really never know what's going to feel the best for you in the moment. So I'd plan to have a water birth, but also have towels and dry clothes ready if you want to get out and move around too. I gave birth on dry land and didn't feel like I needed the pool for pain relief, but most people find it helps a lot.