Been there; done that, only with a son. There are other considerations in addition to camera and lens. Yes, get as much lens as you can afford. My go to lens was the Nikon 70-200 2.8f. The other issues you will face are lighting - a lot of pools use sodium lights and will need correction. Also, angle will be a challenge. For indoor shooting, most of the stands are on the side. If your daughter also swims age group in the summer you will find many more options for background, angles and lighting. Enjoy!

Subscribe; use both.
Love LR for the ability to catalog, use key words and find images.

Last year I purchased a Fuji 900EXR has a 20x zoom.
Great pictures; reasonable price.
Can carry it in your pocket.

If you are going on a photographic tour with a reputable operator, I would take THEIR advice.

We did the battlefield this spring before the 150 anniversary. Opted to hire one of the certified guides that are available through the Visitors Center. They drive your vehicle which allows you to shoot. A wealth of information, they can also suggest places you may want to come back to depending on light, weather and personal interests. An investment worth the price.