Looking for ideas on how to Roll up/store 50 amp cord

The factory one, the good one, is heavy and stiff. But...make one lop, on arm turn the other way for the next loop and so on on your off arm. You will have a strong arm by season's end if you extend the whole cord, and coil back up. Next coach will have the cord, water and sewer on powered reels. It makes things easier f the cord is clean. If it has been down in the dirt or gravel or rain, it gets cleaned by hose or just wiped clean, by wife as it is retrieved.