200 yards is neither long nor short range. If I expected a 200 yard shot I would hunt with a fouled barrel, but if it was just a remote possibility and most expected shots were 100 yards or less I would probably keep it clean.

Powder residue can hold moisture if you are in a humid area. Keeping it cased when you bring it in the house from the cold should help with condensation. Storing it is a soft case is not the best, but not too bad if the rifle is prepared for storage. Get the copper and carbon out of it, oil the barrel, and wipe it down and you should be just fine.