Hello!
Can anyone give me approximate driving times between these cities?

Nafplio-Dimitsana
Dimitsana-Gerolimenas
Gerolimenas-Monemvasia
Monemvasia-Nafplio
Nafplio-Galatas

Thanks! Also, if we want to see MYSTRAS (I understand it is a must see), when should I squeeze it in? Make a detour going to Monemvasia?

Thanks in advance to all who can help me.

Have you tried www.viamichelin.com? I have used it several times in the past for driving directions/times in Europe and have found it quite helpful.

Thanks for the tip! It is indeed VERY helpful.

In May this year we did Nafplio to Monemvasia in 4 hours including about a half hour at Mystras.
Unfortunately we arrived at Mystras at about 5 minutes to three. Despite the information in the guidebook we were using, which said it was open later, they closed it promptly at three. It looked amazing but unfortunately we never made it back. Something to do on another trip.

I just looked at my journal and realized that I was wrong n my driving times from Monemvasia to Naphlio. It was closer to 7 hours. Stops included.