WestTexas

Our first time out we carried a lot of water (5-6 liters each). But as it turns out you'll cross a lot of little streams, most of which have at least a small area of moving water that you can pump filter. After the first time, we brought enough water for on the trail drinking / lunch, and then planned to camp near water water for dinner/breakfast. In the January / February months, I probably only carried 2-3 liters in my hydration pack. Then we'd camp and pump/filter a few gallons into a collapsible container for dinner/breakfast and refilling hydration packs. If you've got enough time, you can cache water at road crossings, but the logistics of getting it there in advance is time consuming.

As far as best areas for loops, I like the west end, the area between Richards and Stubblefield park at Lake Conroe. There are several different loops and you can craft a hike of any time/distance that you wish, the trails are good and well marked and the scenery is nice.

I agree on the spiderwebs. We always carry hiking poles for knocking down the webs and climbing down and up the numerous little creek crossings you'll come to.