Reddit reviews Coleman Cable 02687 10/3 Vinyl Outdoor Extension Cord with Lighted End, 25-Foot
We found 2 Reddit comments about Coleman Cable 02687 10/3 Vinyl Outdoor Extension Cord with Lighted End, 25-Foot. Here are the top ones, ranked by their Reddit score.
HEAVY DUTY 10 gauge, 25 ft outdoor extension cordPerfect for large tools and appliances such as a hammer drill, multiple drills, and large heaterLIGHTED END shows power is on and cord is ready to useSTRAIN RELIEF clear molded plugs prevent accidental bending or breakingDURABLE vinyl jacket resists oil, grease, moisture, and abrasionHIGHLY VISIBLE bright yellow jacket prevents accidental tripping and loss on worksiteThree pronged extension cord provides 15 amps of powerUL LISTED
Given you get a proper 10 gauge / 15amp outdoor rated extension there is no reason you can't use it daily.
Edit: You won't find these at your average store they are more expensive too.
Edit Example: https://www.amazon.com/Coleman-Cable-Outdoor-Extension-Lighted/dp/B00004SQF1/ref=pd_sbs_60_2?_encoding=UTF8&psc=1&refRID=4WYJRS6ZZ2RWFGZQB0M3
If I were in your position, I'd install one of these on the van, and then cut the female end off of a 10AWG cord like this and wire the remaining male end of the 20A extension cord, to the female end of the first kit.
The inlet door will never come open from driving down the road with the above inlet, it latches, exceptionally well. There's no twist-lock, it uses a patented latch to stay in place. Additionally, if you ever did find yourself needing to use the 30A RV plug on a generator or campground's power pole, all you'd have to do, is buy one of these and use it in place of your 20A setup. No rewiring needed.
I've installed a couple dozen of the smartplugs, and have yet to see one fail.