I carry a 10 foot extension but I haven't had to use it. I have used my electrical cord extension and my extra water hose so I would suggest that you carry those. Better to have them than not.
Usually, if you can get close to one, then it's the others that need to be long. So I work to be close to the sewer and let the water and electric be long.
1988 Coleman Sequoia - popup (1987-2007)
2012 Roo19 - hybid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10