I had a great time hiking Walter B. Jacobs with my dog, but if you go, beware the mud! It had rained about 36 hours before I visited, and there was mud *everywhere*. And there were clouds of mosquitoes. In case you forget your OFF, though, there's a box full of it attached to the front of the interpretive building. Take advantage! Also, it's spring, and the orb weavers are out. No one had hiked the Caddo Trail in a few days, and there were a lot of webs across the trail. Lots of the signs need some serious TLC. But we had a great time! There's tons of shade, so it'll be a great place to visit in summer when it's hot and hasn't rained in a while. It was a bit of a challenge, but only because it's rainy springtime. Otherwise, it's an easy hike. I'll be going back very soon.
This park just seems really run down to me. The trails are not well marked. Mostly flat short trails. There are some good birds that can be seen in this area though if you like birding. If you are looking for good walking trails and birding I recommend checking out the Red River Wildlife Refuge instead.