No we don't generally take a hose off we try to do the path of least resistance. I would say if you didn't have a proper stand to put it into (we are lucky as we have the electronic lift stands from Park at the workplace) then yes I might consider removing the caliper as cxwrench said but I don't know that I would worry a ton about that. We certainly don't and we want to make sure these bikes leave safe plus having to take them back in and store them and work on them is a pain and a lot of these folks aren't super near the shop or aren't near enough they are comfortable riding.

When in doubt ask the local shop that sold it to you and see if they can help out, save you some hassle and headache. I personally don't mind bleeding brakes but for a big cargo bike I would not want to do it at home, those things are heavy and my stand can't really handle it at home and I don't have the set up for the park stand nor the money.