I carry 50' & rarely need more than 25'... The thing you may appreciate even more is a set of push on rather than screw on connectors...saves a bunch of time and skinned knuckles as you can connect in less than a second.
We have up to 100', but have it in 25' sections.
We camped at Ocean Lakes in Myrtle Beach a couple weeks ago and were quite surprised to see they supply cable at each pedestal. Its wound up and there at everyone. Pretty cool.
__________________ Jim & Evelyn
-2015 Ford F-350 XLT Dually
-2014 XLR Hyperlite 27HFS
-2012 Harley Davidson Street Glide (his)
-2004 Harley Davidson Fatboy (hers)
On occasion, we got extra lengths of cable to use from the campground at not extra cost. Most campground stores should have them for sale also (huge markup, of course). We were even supplied with extra 30 AMP power cord from a campground in So. Illinois (Little Grassy).