I'm in the same boat as a lot here. I have a Rivian R1S on order, and also a Cybertruck. With wanting to off-road/overland pretty far into the wild, I just don't think they will work. Especially if it's cold out, and I want electricity use at the destination too.
I'm seriously thinking about doing a Gladiator Rubicon Diesel build instead (even though it has a frustratingly small fuel tank of 18 gal forcing me to get external tank(s). I'll still buy the Rivian and Cybertruck to either keep or sell, but I just don't see EV's being suited for overlanding quite yet. Hell today running my A/C for 6 hours in my Model Y parked in the shade used 16% of the battery pack.