I quite like my old Minolta XD7, sounds like it might fit your bill. It's very small and light, will work at limited shutter speeds without batteries so will survive the cold. I use it mainly for mono, shooting either FP4 or HP5 depending on the light, then scan the negs in using an Epson 4490. I can print quite easily up to A4, never tried A3 as my elderly PC can't handle the large file size. Both scanner and camera fit easily within your budget.