A bucket dumping station on the back of your truck helps. A neighbor of mine has one. Its just 2, 5 gallons pail the bottom one with a bilge pump, and a top one with hole in it as a strainer/slosh reducer. The pump runs up into his gathering tank. Its a lot easier than jumping up on my tire and slinging the bucket overhead.
The retractable hose idea isn't bad, but I would guess it's cost prohibitive.