For smaller glass I've never found or observed a better way than ChuckC's first option. I've been wearing mine this way for a loonngg time -over left shoulder, across body, under right arm for right handed shooter. Out of the way, protected under your arm from rain if needed, easily accessed and stored, and quiet. I wouldn't even touch a system that took 2 hands to work.
Leave one end of the string a bit long, and fiddle with length till you find what works best for you.
Cheap, too.... but some folks figure it ain't no good if it isn't expensive :rolleyes:
R