Be forewarned about curing your own driftwood. Some wood, no matter how dense it seems ends up rotting when put in an aquarium long term. Hopefully you will get a good idea of what it will do after boiling and soaking for a few weeks.
Lots of driftwood on Aquabid too.
As for Java fern, way back when before I knew any better, I planted a little bit of it. The roots and rhizome did not rot, contrary to popular belief, it didn't grow a whole lot while it was planted (6 months or so), but it was healthy when I pulled it and attached it to a rock.
I have actually had a similar experience with Anubias Lancelota, although I did know better but had to bury some of the rhizome jus to get it to stay down. I've since re-located it to a new tank and it is thriving with just a little bit of the rhizome tucked into the substrate.