I haven't Dip-netted for them but when I lived in Henderson, NV I cast netted for them. Late Summer through Fall they'd show up in Hemingway Cut on the Boulder Basin of Lake Mead. The cut had an underground spring and maintained a more constant temp than the surrounding waters. On a good day one throw would get 50 shad, with 10 being more like the average.
For fishing, with Striper as my quarry, I'd back hook one on a #2 or 4 Octopus hook. This would be on a 5' 8# leader attached to a swivel with a 3/4 full small or medium Castabubbble sliding above that. The vast majority of the Stripers were under 6# and I'd use a long whippy rod and 6# main line to make it fun and get neccessary distance. If I remember right the rod was a 9' 5weight flyrod before being converted to a spinning rod. It was very fun trying to control the 14#er I caught with it. :7
Tight lines,
Wade