we drive a Wagon R+ 1.3 at home and these are very good roomy vehicles. You sit upright and have a good view over ordinary cars and they will take 4 tall adults.
We had two coach trips to get there , a ferry crossing from Poros to Kilini with the coach. It was an excellent day out even if you are not deeply into Greek culture.We had an excellent tour guide who took us around the site, we then had an hour and a half on our own before returning to thecoach and moving on to the museum. This is superb. Well laid out and the tour guide was able to answer quite searching questions. It would have been better with a little more time on both sites but it was a full day.
We have visited this twice. It is very well laid out and not like the usual stuffy museums. Great costumes of the past and room layouts with the old tools and implements. Well worth a visit.
We used Kosmar twice before we went independently. The only reason being that no operator semms to do a three week holiday. Doesn't fit in with their schedules. Stayed at the Ermioni on both occassions. Upstairs back rooms would be our choice for a more peaceful stay.
Would highly recommend.