I bought a package this year and set it up in a 4 foot long top bar hive. They are really doing well and expanding like crazy such that I only have a few bars left. But now what? If I don't do anything they will fill out the box and I may not be able to inspect it anymore. I can try to harvest some honey but I don't know if they have enough capped honey bars to make a difference. But that is an option. I guess I could also do a split since I have an empty top bar hive available. But is it too late in the season to do a split? I'm in Colorado at about 5000 ft elevation. If I do a split what is the most effective way to do it? Should I buy another queen or let them create their own? I've done splits before but haven't been super successful at it so any help will be greatly appreciated.