I thought I would post a few things that I do in Arid South Australian conditions to conserve water. This is just a start...
Don't wash up you pots. If you do, drink the washing up water.
If you are running low on water, don't eat any fatty foods-stick to the carbs that you have. Also, put off going to the toilet a bit longer than normal. Gives your body a bit more of a chance to absorb water and nutrients from your stool.
Don't use water to brush your teeth. Don't even use toothpaste. Flossing and brushing is all you really need.
I find that hydration hoses tend to make you drink more (for me anyway), possibly more than I need to, because I can't tell how much I am drinking until it is all gone. When I am close to my water limits I put the hose away and just stop for a break every 15mins. Get the bladder out and drink then. If you allow yourself to drink more than about 700-900mL in an hour it is a waste anyway. Your body can't absorb it. I now just use two 600mL bottles on the side of my pack, and carry a few large platypus bladders for the rest.
Take regular breaks. In shade if possibe. In a breeze too. Take off your pack, even your shirt and hat to cool down-you want to minimise the need that your body has to sweat.
As said before walk in the cooler parts of the day. In Sth Aus this means get your walking done before about 1pm in the summer. It will still be too hot until after dark. Might be different in Florida.
Dont eat a hot meal. If you need to cook it to prepare it, let it cool down again. Don't consume any caffiene-its just wasting water.
This is a start. In deserts here I am considering using water transpiration bags while I rest in the afternoon heat, plus constructing a UL still, so that I can process and use saline water in some inland salt lakes and creeks.