Very similar time frame as mine,accept we had hit a few nights in the 30's before I got to them. Yours appears to be much stronger than mine, which had no brood. I ended up combining mine with another nuc and will overwinter them in a poly nuc. If residence see swarms every year, sounds like a great place to set up a swarm trap. I have an assisted living facility that tries to keep the residents busy and have started a gardening/wildlife program. All their landscape is native plants and they no longer use any pesticides/feterlizer/etc. They have gone "green". The have also built bat houses and many bird houses. I was invited to give a presentation on bees, and many remember parents/relatives keeping bee "in the day". Needless to say, by the time I left, I had a new swarm trap location.