Just tossing this out...I know it wasn't the question...in your planning, if you go from north to south, you will not regret that. That direction of travel will enable you to leave the highway to oohh and awww and then pull back into traffic withput risking life/limb. Going south to north is just plain dangerous, for the mentioned reasons. Even other RV'rs accelerate to try and get ahead of an RV driver trying to get across two/3/4 lanes of traffic.
Gary Haupt