I never got any charges from a USA ping delivery. I think you do get some charges in Canada.
Yes, big is good. But not if you won't really use that much range. With a 30 ah pack, and 60 mile range, will he ever really go that far? 20 miles each way sounds like a long ride for him to me.
Easy as pie to add 10 ah more later if you really needed it. Expect 3 years from a ping, unless you run a big motor on a small one. One 15 ah ping or similar pack will run a 20 amps controller.
Do you have any info on his real amps draw? If it's high, then an A123 20 ah pack would be the best choice for pack 1. Then he wouldn't need to carry both all the time.