Dear Michael and WeatherCatters with road-trip inclinations,
This thread is definitely off-topic, but I suppose this forum has low enough traffic that it doesn't matter too much.
You are correct. Range reduction when towing with an EV can be as much as 50%. Significant range reduction also occurs with gas vehicles towing, but gas vehicles typically have more range to start with and gas stations for refilling are everywhere. So if you want to tow a trailer, best go with a gas vehicle.
Yes you are correct. Unfortunately, that is very much the issue with respect to my trusty wagon. I upgraded to a big-block engine to have sufficient pulling power to cope with a mid-sized vintage airstream trailer. However, gas mileage has suffered. I will need to have a large custom gas tank fabricated so that I have enough range to make this scheme practical.
On the other hand, electric motorhomes are already starting to show up on the market:
https://motorhomefaqs.com/electric-motorhomes-the-future-is-here/On another note: I just got back from a cross-country road trip, coast to coast, (ended up being 12,000 miles) in an electric vehicle (I wasn't towing anything). Charging infrastructure was more than adequate for the trip and cost us 50% less than if we had been in an economical gas vehicle.
Congratulations on your success! However, I'm sure the reason the charging infrastructure only sufficient because electric cars remain relatively rare.
It is true that the energy costs of an electric vehicle will be less because electricity can be produced much more efficiently than the power produced by an internal combustion engine. However, at the moment there are significant subsidies associated charging stations. So, those saving may not remain as large in the future.
Edouard