If you neglected to fill your tank in Monemvasia's port (a.k.a.
Gefira or Yefira), you can stop at the
service station between the causeway and the old town's walls. (A hotel, the
Lazareto, is just up the hill.)
If you live outside the
EU, a tax-free Renault
tourist car lease can be cheaper than renting for visits of three
weeks or longer. Minimum driver age is 18, there' s no upper age
limit, and rates include insurance.