To be honest you are never sure how close or far you will be from an EHU unless you know the site. Most campsites have them nearby to individual pitches but some CL or CS sites may have them only in one area of a field, that's if they have them at all. I carry a 25mtr, a 35mtr and a 25mtr reversed polarity cable which allow me to park up a fair distance from the power socket. I also have a couple of portable solar panels and a couple of habitation batteries so power is not as essential as it might have been.