I think those estimates of 35 million people (some of them don't say 'additional' btw) for the Jubilee year are inflated. Looking at the past Jubilee years, the numbers were lower than expected.
Other than that I can't offer much help. If you want to explore for a week by car, consider Provence or Perigord areas of France maybe for similar feeling -- good food and wine, pretty towns, lots of history....