Transportation in Cotswolds can be done by rental car, train, or taxi. A rental car would be the most convenient and allow for the most flexibility. However, it is also possible to get around using public transportation, such as trains or buses. Be aware that some of the smaller villages may not have direct public transportation, so plan accordingly. A rental car would cost around $70-100 per day, and parking is easy to find.
If you have more time, consider visiting the nearby Blenheim Palace or Warwick Castle. And if you have less time, focus on visiting either the northern or southern Cotswolds. Also, don't forget to pack comfortable walking shoes, as the best way to see the Cotswolds is on foot. Finally, book your accommodation well in advance, as the region can be busy during peak travel times.