We didn't get to the pool until later in the morning and warmed up around 11 AM. It was a zoo. There are two 25 M warm up pools, but there are 5500 swimmers here using them. It reminded me of the old 1970's marathon AAU events. You can't possibly get a good warmup in the middle of the day. Have to remember that for future days - get here early in order to warm up with (hopefully) less people in the pools and more pools available.
Finding a place to sit in the shade is also challenging. Every shady spot is generally taken. It's also tough to walk around the deck with so many people around and half the deck taken up by the marshalling tents and pathway to the blocks for competitors. We ended up sitting high up in the stands of the stadium pool in order to get shade in the afternoon. Those who went to the Arizona nationals will remember climbing the stairs in the heat to get up high in the shade. It's the same here, but not as hot. Climbing up and down those stairs all day wears you out.
Today (Sunday, day 3) I'm supposed to do the 400 IM but I'm scratching it. I just can't see doing that event when I'm tired, sore, and not prepared.