Yamadori hike at my friends' 100 acre mountainous property near Virginia's Old Rag Mountain. We hiked for about 2 hours scouting the various terrain.
One side (east and south facing) was all mature red and white oaks, hickory, poplar, red maples and lots of standing dead ash trees---victims of the ash borer---but virtually nothing of interest for bonsai.
The other side (west facing with lots of granite outcroppings) was a much better hunting ground. Mostly I got Virginia Black pines, but also 2 mountain laurel (Kalmia latifolia) and there's one deciduous mystery tree about 12" tall that's just budding out.
I just bought a hori-hori yesterday to use today, and since most of this material was growing in rock crevices it would have been a very different experience without that tool!
I know that neither Virginia pine nor Kalmia are great for bonsai, both are dear to my Blue Ridge soul and that they were all in loose soil tucked into crevices made them attractive prospects for me.