How long will you be actually camping for?
Here’s a thread I started on another forum about drying boots and snow camping. There’s LOTS in there about drying boots, which you might want to skip past, or not! Plenty of sound advice about snow camping in general, though.
http://splitboard.com/talk/viewtopic.php?f=2&t=9278&st=0&sk=t&sd=a
stoves: MSR dragonfly have been used on expeditions for years. Dependable and plenty heaty.
And I’d hope it’s going to be a good slice colder than 0 degrees C if you’re going ice climbing!
Edit: try ukclimbing forums for barely-used kit. I got a worn once pair of ME cirrus insulated trousers for £35, friend got a professionally cleaned -20 Mtn. Hardware bag for £85.
worth putting a WTD post on there if you’ve decided on a couple of possibilities. you neveer know!