I agreee. I used to be a weekend warrior driving from ca to Laughlin for the weekend. Getting all the boating in I could. I’m older and “ wiser” ?? It’s no big deal now a days. Night time on the river is a whole different game than my nights on the lake.Navigation light are a necessary requirement after sunset. But, put them against some back lights and they become very difficult to distinguish. BTW - The USCG definition of sunset is, "When you can no longer see the sun". Therefore when the sun drops behind a hill or mountain, it is "Sunset".
Tragic accident. Let's wait for the facts to come forth. But, IMHO, boating on a major holiday weekend and boating after sunset, bring on substantial increased potential hazards.