Hi and a big WELCOME!!!...It's not anything I'd worry about...As you stated, most were turned away. Those that did get in probably spent too much time fighting off bees to have gotten more than a hard-earned nibble.They are not likely to return....I have seen about 5 bees latch onto a yellow jacket, and they all fell down thru some knee-high grass. About a minute later, the bees came back up and took up station on guard.