As we visited the site by motorhome, we slept in a dirt park right by the canal and there was no problem, it was right at the beginning of the strait, on the Aegean side.
There is a bridge, which submerged, when permission was given for the boats to move forward.
To see the passage of the boats in the most central part of the canal, we took a short walk to the big bridge above and from there we took some beautiful photographs and observed thit fantastic work of engineering.
Anyone who is just passing through, can stop at a park near one of the bridges, there are cafes and restaurants in case you feel like getting some rest.
Coordinates of the park in which we spent the night in a motorhome (without facilities), in the Canal of Corinth: 37º57’03.3”N 22º57’36.6”E