Great pictures, especially that little cutey in the last one! Not a lot to go on for an ID in that photo, but the bee appears to be carrying her pollen on her legs, so probably not a Megachilid of any sort (a mason or leafcutter). She's got some pretty big mandibles on her though. I saw my first native bees this week, the first male carpenter of the season and a little green Agapostemon that was stuck in the house. He might have come out of our firewood, but I'm not sure.