My dad has been taking out the family's 11' Lance out to the desert on our Ford for years. With that experience I don't recall any areas with issues of approach or departure on Old Ore rd. , but there are some slight hills to climb and it's slightly off camber that I don't know about taking it on. If you went on Old Ore rd. take it from the bottom up. River Road should be no issue, it was level gravel rd. just a remember there's some loose gravel sections.
Nick
Nick