Keep baby out of my store and we’re good. I don’t see the problem if there’s no crawling/walking around on the sidewalk or stuff like that involved. Not a baby owner, though.

Sure, just make sure they aren’t getting too much sun and like someone started out some sunblock on them.

Sun block is not optional for the wee ones.

And a light shirt/pants/onesie would likely be okay to.

Make sure to bring a bottle, not water, to avoid dehydration

Sure, just be prepared with sun block and the diaper bag. I always had some extra clothes in the bag anyway.

I’d still put them in a light onesie. They’re pretty small and they don’t have much thermal mass, so they may get cold despite the weather. Keeping them in shade like you’re suggesting is a good idea.

And like others have said, have lots of formula/milk for them to drink.

If they’re having a bad time they’ll probably let you know, so be ready to head indoors if they get cranky.