After stuffing ourselves at a casino buffet, we decided to make a night-time attempt on the confluence. Do not make decisions on a full stomach; after meals, the brain lacks blood.
Heading south out of Vegas, there was freeway work everywhere; roads that were supposed to exist did not seem to exist. We ended up on the Boulder highway, heading south. I exited at a random exit. It turned out to be just the right one. We consolidated ourselves into a single vehicle & went roaming around some mountains. We soon discovered that reaching the confluence would require some hiking -- ill-advised in the nighttime desert. We headed to Boulder City for the night.