Considering 2022 Prime XLE in Sun Valley, Idaho.

Look at how the back seat folds down before you pack your sleeping bag or bike. The bigger battery takes up extra space. I think the car will be great driving where you are, but maybe not so much for snoozing.

You'll want good snow tires. The electric car puts lots of power to the front tires quickly. It's easy to spin a front with just a bit of accelerator pedal. You want tires with great grip.

 

sounds like the perfect car for you. check out the prime camping thread

 

Welcome! It sounds like a nearly perfect fit for your situation.

As @PT Guy points out, the back seats don't fold flat. But I've seen posts where owners have made little wooden platforms to provide a flat surface.

And on my trips to the mountains, my Prime has been fantastically efficient if not exactly a rocket sled going up steep grades at high altitudes.

A thought or two on the XLE vs. LE or Limited. I got the Premium which is the old name for the mid level. I though I was getting the best of both worlds by getting power seats and the big display plus a couple other niceties. I've since discovered that I got the worst of both worlds. Almost everyone, including me, thinks the big display sucks because it's so poorly implemented and generates a ton of glare at times. The small display on the LE (and my wife's Prius 2) is way better. Like the XLE/Premium, the Limited/Advanced also has the sucky big display, but that's compensated by the safety features that really should be on all Primes such as blind spot monitoring, rear cross traffic, etc. Just something to consider before buying.

 

Also, these cars don't have much ground clearance---but, there's a reason your location isn't named "Snow Valley." The two times I've skied there we had dry roads...and not enough snow to open all the runs.

 

I don't think you can comfortably sleep in a [prius] Prime, unless you're really, really motivated. (tired, or modify the interior, etc)

We did drive ours, with X-ice 3 winter tires, to SLC, Big Sky, and Jackson for a snowboard road trip just before Covid hit.
We plan on doing 1-2 similar trips this winter. Unless its in a dumping storm, main roads shouldn't present clearance issues - its not that lower than most new sedans.

Hard to find, and a big jump in price, but a Rav4 Prime would offer much more GC and sleeping room. Or simply go hybrid and find a Sienna - no PHEV, but delivers mpg of the Rav with tons and tons of room...