OK ... not sure where to post this but I know folks here will have great info. Thinking of driving (4-wheel style) from Charlotte, NC to Yellowstone NP the end of this month. Long story but wife has booked a "wolf discovery" deal with the NP. I am wanting to avoid flying but not sure it's worth the effort. How risky is the weather? I have some flexibility on time and route. I am thinking so long as there are no "active" snow storms the interstates should be OK.