I ring my bell; I never announce verbally because my voice isn't very loud unless I shout.
Those who ride on MUPs: Aren't you finding traffic way down compared to last year? Much more toward "normal" after the big quarantine crowds of 2020. I ride on one of the most well-known rail-trails in the Chicago area (heck, one of the most well-known of anywhere) and I keep thinking the big crowds will be back as soon as summer gets here.... And then I remember tomorrow is Nov. 1 already. It just ain't as crowded as 2020 was.
The bell is more than sufficient.