The towing range of an F150 Lightning is actually twice as far as its ICE cousin.
We’re also not fully utilizing the possibilities of trailers yet. They can bring extra battery. We just need the hookups to make it happen. The aerodynamic cost is already paid by having a trailer, and extra weight is less meaningful for highway travel.
I’m calling bullshit on that. Here’s an article from motortrend showing it has a towing range of just about 100 miles. I’ve seen that backed up by numerous other tests. https://www.motortrend.com/reviews/ford-f150-lightning-electric-truck-towing-test/
I’ve seen references to the ICE getting 9-10 with a 23 gallon tank. That’s more than double the range with a refuel time being an order of magnitude faster.
Batteries in trailers would help. However now you have a battery to tow, which would still have an impact both because of stopping and going and the DOE estimates for each 100lbs extra weight in your vehicle, your MPGs gets a ~2% reduction. Additionally I would not recommend strapping a battery to a boat trailer unless you are sure it was waterproof. Even then it would make it sink into sand easier.