Heading to Harlingen from the Tulsa area pulling our new trailer. Since we are newbies we really think we should avoid large metro traffic. Can anyone suggestion the best way to go to Harlingen? Also we have heard that from Austin to San Antonio is really horrible traffic. We have also heard that the highway between Big Cabin to Dallas is too rough for trailers and that it really bounces things around. Thanks in advance for any and all helpful suggestions you can give us.