Your range per charge sounds about average compared to what many of us are experiencing. Sounds like you have a really fun place to ride over there, be sure to post up some pictures for us to enjoy.
I have enough trouble keeping 50hp from killing me, 130 would leave me so deeply embedded in a tree it would be a form fit casket. But it still wouldn't quite solve my range issue....
The dealers I spoke with in my area before I bought mine didn't really seem to know how to charge the bikes at all, or have any useful knowledge regarding the bikes at all.
The easiest is to plug it in and hang out with it until it reaches about 50%. Or alternatively, set a timer to remind you that it's time to stop the charger after a bit, guessing at when half charge has happened. But I don't have any simple suggestions for performing this automatically. If...