A longer hose should reduce your suction. So, therefore, it will help preserve the bees rather than hurt them more. The only thing I would worry about with a hose that long is, how many bees are left inside when you are done?
The suction on your hose should be only just enough to bearly pull them off of whatever they are standing on. They shouldn't be "ripped" off by the suction. With that much suction they are sure to get crushed inside the vaccume.
A friend of mine who does a lot of vaccume removals put it this way:
"only enough suction to make it annoying for you to get them off the comb"