Thanks guys!
Here's a few shots of NJB on the local riverbeds around my home airport.
We've had a lot of rain lately, and I was surprised to find the riverbeds in good order without a lot of driftwood obstructing the gravel. I spied a good space to land a long way up a small tributary, further up steam than I have been able to land before. This spot was a one-way landing, unless you wanted to fly in between trees in a very tight river bend to escape. As you can see from the tall trees in the photo.
The bar was probably about 100m long, but I got slowed to walking pace within about 60m despite landing 10m deeper than I wanted and having a 5kt tailwind. I put that short ground roll down to the early flare and very "firm" landing, oops! At least I was going slow and stopped quickly. The new tires are very good at soaking up a big impact.
At the end of the one-way landing place.

Not a bad surface at this end, much worse at the far end.

The impact crater... lol. At least the big tires and Bearhawk L/G are forgiving - no bounce and no stones thrown into the tail (this time)!

You can see the tall trees at the sharp bend in the river. It wasn't quite one-way, but I wanted to avoid that go-around if possible - even if I had to run into shallow water during the last few metres of roll-out.