John,
I refer to 1.5" hose in 25' sections.
Space in my van is at a premium, and the floor-space is being constantly re-arraged to accomodate different equipment to suit the requirements of the work being undertaken. A hose reel is out of the question since it would need to be bolted down in a fixed location.
The sides and bulkhead are taken up with shelving etc., so there is no spare hanging space. Even the four wands are located near the roof.

By having the hoses controlled within a bag, they take up far less space than in separate bundles, and can even be placed in the passenger footwell if required to free up additional loadspace.