I'm winding up my first mountain backpacking season with an EV. My EV (subaru solterra) is infamous for not having great range, only about 240 miles, but other than EV trucks I think it has the most off road capability and I do need a little off road ability to get to certain trailheads. My Crosstrek always did the trick (really no worse than when I rented a Wrangler a few times) and at least for year one the Solterra got it done.
My very first hiking trip with it wasn't even overnight and it was a failure...because I failed to plan. It was a trailhead at about 8000 ft and I was leaving from near sea level. But it's only 90 miles away. It was a very hot day but at that elevation the weather is always nice once you get there. I left home at about 60%. I figured I'd drive to the trailhead, hike to the peak, coast down the mountain and get a little charge back, maybe charge up somewhere on the 70 miles I'd have left to get home while I ate dinner. Well as I steadily drove uphill and with the AC cranked...I realized I was not at all getting the estimated mileage, then when I actually hit the mountain going up steep road I knew it was a possibility I'd barely make it there, I had to turn around and backtrack 20 miles and ended up at a busy charging station on Labor Day. It was just terrible planning. I needed to either leave home near 100% or charge at one of the many fast chargers in my own neighborhood before leaving. The combo of extreme uphill and extreme heat really did it in.
The good news is that my next few trips where I planned better went fantastically smooth even though they were 450 mile trips way into high sierras and some of the highest elevation in US where trailheads start as high as 10,000 feet. I can honestly say these other backpacking trips took me no longer than they do with my old gas and hybrid cars. The fuel at the DC fast chargers cost about the same, but because I left with a full charge from home and practically free fuel, it was still slightly cheaper than gas. I stopped twice on the trip, and by the time I took my dogs out, went to the bathroom, and got a snack I was at 80% or higher and ready to go. Really no extra time, I've driven through this desert to get to the same mountains many times and I stopped in the same areas I normally would. Of the maybe 7 charge stations we used we never had to wait and only one time we pulled in as the last open spot, the only bad one was the unplanned first time on Labor Day.
By the fourth trip we were commenting on how fun it is compared to just getting gas randomly wherever you happen to be when you get below a quarter. Planning where you want to stop actually improves a trip. I think my car will be open to the Tesla network early 2025 and the options for charging will basically double.