To all. Thanks for the replies to date.

I'll probably not add the flag as the only way it would be really visible is when a car passes by or at an intersection.
I'm pretty well covered as far as reflective tape and lights for reduced visibility lighting.

As with some others, I've also noted that cars and trucks give more room to my recumbent than my DF when passing. Think that this is because you kind of disappear from view.