My TBH swarmed. It was installed in Mar same as this one....I didn't see them go but watched them find a spot in a tree...they spent a few hours there then moved...the next morning they moved again and remained there for another 3 days...thought we were going to lure them into another hive but no luck. They were up much higher than any ladder we had and in a heavily wooded area. Cutting the limb or tree wasn't an option since there was so much underbrush. So they are free. Hope they found a good home and will cast off a swarm in my direction someday.
I know what you mean, I lost one earlier this year because they landed about 45 feet up in a tree. At the time, it would have been more trouble and time than I had to dedicate to trying to recover them. I had a couple of swarm traps out but they decided to go elsewhere.
However, I've never tried it, but hear it works....if you have another high swarm, you may want to give it a shot. Get a line over the limb they are on, as close to them as possible....throw, sling shot, bow and arrow, etc. etc. Then pull up a frame of brood comb next to them, let it sit for 15, 20 minutes, or a half hour. They say all the bees will move to it, slowly lower it down and hive it.