Rent a car ... that road is the most modern in greece - divided highway all the way to Corinth Canal ... fun to stop about 15 20 Km after the Canal to see ANCIENT NEMEA -- a "runner-up Olympia" ... authentically excavated, wonderful Stadium ... and you are in luck! There is a RE vived Nemean Games every 4 years, attracting entries not only from all over Greece, but from around the world. Thousands of people dress in white Kaitons (sp), short gowns, and race & compete in stadium ANd this year it's JUne 25!! Even if your Day 1-3 doesn't coincide, there will be interesting lead-up or aftermath. Also, do you like wine? (SIlly question, u are "Big Athens KId) ... Nemea is heart of Pelops wine country... there's a vineyard just 300 yards from the ancient site... also in the village of Nemea, right on its Main Street, is a winery bottling/tasting bulding. We stopped in and there was a mini-automatic bottling line, pasting labels on Nemean Red. Lots of huge barrels to taste & buy (or not). Luckily our driver was teetotaller, so we sipped away!.
Try to stay in Old Town... my fave hotel on the seafront, AGammemnon, is probably booked solid.. best location in town. Other nice ones are on narrow streets, so beware of possible late-night noise, from the many cafes below. One in a quiet & lovely location across from Folklore Museum is Omorfo Poli... Also... U might look "up above" on high street, Zigomata... Pension Eleni, Pension Nikolas see if they have rooms/ balcomies looking down on the town & seaa. -- avoid Hotel Leto Nuovo ..