You will find that difficult to do, if the appointments within are traditional ( lighting fixtures, door styles, stair railings, fireplace style and finish, kitchen cabinetry, built ins etc. A casual, relaxed, informal feel however, can be achieved. Lodge effect in the mountains, be that rustic country or modern............might be an expensive mismatch that comes off as nothing but contrived and forced. Post some interior photos

After paint, always base your home furnishings around your rug. Since you're going for the rustic look, I would go for a traditional oriental style with shades of red and ivory.

Be very careful with pine. It can go orange on you quickly.