Impressed with MPG in old rig

The people with Teslas towing small trailers like Airstream Bambis are seeing about a 40 percent drop in range at interstate speeds. But interesting enough the range goes up quite drastically at around the 50 mph (80 KMph) speeds. Speed is the range killer for EV's. Both of our vehicles are EV's and we notice this a lot. We have a rated range of around 180 KM on our leaf but when we go for Sunday drives on secondary roads where the speeds vary between 60 and 70 KPH the range can easily shoot into the 240 KM range. Our province has a pretty good fast charger network and growing bigger every day but if I was pulling a trailer I would be keeping close track of the GPS and where the next fast charger is if I was pulling a trailer. Then again, its not designed for that so that won't happen. I guess the other challenge is that no DC fast charge station I have seen is designed to accommodate anything but a full sized sedan. Campgrounds with 50 amp service would work for an overnight charge though. If it got common there would have to probably be some infrastructure changes though. I suppose it is not a matter of if but when. Things are moving fast in the EV world although a lot slower in North America generally speaking.