Here's another YouTube video from my last visit to the Las Vegas area. Three of my RV-flying friends and I did a practice four-ship formation flight over Lake Mead. The RV owners include experienced former fighter pilots (lead on this flight was the aggressor squadron commander at Nellis AFB before he retired); I'm still learning.

We practice regularly, always with a detailed preflight briefing and a post-flight critique. It's a fun skill to learn with proper instruction.