@Patk
Your best bet is to have a look at www.plugshare.com it has an excellent map which shows the location of most publicly available chargers and has a comments section to let you know exactly where the charger is located and if there is anything notable about that location.
I just had a quick look and unfortunately your only option along the way is a 90 amp charger in Kindersley.
Thanks for the plugshare website! Very helpful.