So when the wife and I go on walks, we keep our masks around our neck but if passing people or we get into a more congested area we put it on - but if someone is across the street or something, we don't bother. I know that's probably more liberal than some get with masks, but we're fully vaxxed and outside so it seems ok?

But yeah - I certainly don't see the harm in doing so. It might do nothing, but it might prevent spread and I'd rather default to the better thing for the community.