Pine Guild; need suggestions

I live in East Texas; Not in the piney-woods but in an area that always has a mix of oak, cedar, pine, and elm. Pine tree is however most common. I would like any input that anyone might have about building a pine guild.

I took a walk in the woods today and noticed something I had never noticed before. On 6 different occasions I found what I think might be a natural guild of trees. Most of the time in areas where water runs off or settles a bit there is always a pine tree under which or just inside the dripline is wild blue berry under which (not under the pine) is a grape vine, a cedar tree, and often a clump grass and an oak tree.

What I want to do is put together a guild that works well for this area of the country. USDA zone 7b, but more like zone 8 that has one or two badly timed late freezes. What pine tree makes eatable nuts that will grow well here? Can I use domestic blue berries? Is there a cedar relative that makes anything eatable? How about a eatable clumping grass for grain? Oaks make acorns and the grapes are just fine as they are...

wild gooseberries LOVE to grow at the base of pines. currants will do almost equally as good.

i was going to suggest blueberries, cranberries (highbush) or wintergreen..also bearberry.

Korean Stone Pines grow in you zone. Also, you may be able to graft them to existing pine since nuts trees take a while to produce.
Hazel nuts are also good undersory that grow wild here is my zone along with the Tan Oak, Chinquapin, Suger Pine, raspberries, blackberries, huckleberries & strawberries.