Rob,, let the owner know,, many planes go cross border, it's easier then in a car,, all he has to do is, file a flight plan,, call canada customs 2 hours in advance, if required, get a "transborder tarnsponder code" if equiped,, leave on assigned time, squak code and go,, land at designated airport,, it's real easy,, that is unless there's other things lurking in the background,, like trying to re-enter the US?