I've found wrapping the vac hose around larger type vacs ok up to a point when restricted access is not a problem. However when wanting to move the vac say down a narrow path between walls/fencing, through garden gates, etc the hose makes it much wider to move about so can get in the way.
I find now using a popup bag not only useful to carry and store the vac hose in the van but very quick & easy to take in/out. Not only that the main advantage for me it stops crap dripping everywhere and I have somewhere to put different size/type gutter nozzles etc so are easily at hand when I need them.