We are planning to make this train trip in mid-June (June 12) and hope to arrive in the 5terr that evening. The train from Paris connects in Milan, then to Genova, La Spezia then Monterosso. My question is: does anyone know how crowded this route (especially the Paris to Milan--leaving at 8am on a weekday morning) is during the summer? I am wondering if I should book this online now--concerned that would it be risky to wait until I arrive in Paris.
The europe rail website is much more expensive than Trenitalia, but I don't think i can buy this ticket online through Trenitalia (& I don't know if Trenitalia has a booth/office in Paris metro stations).
Any advice or suggestions would be greatly appreciated!