Hill climbing ability

Hi,

Those of you familiar with Calgary and the surrounding area probably know of the big hill coming east out of Cochrane towards Calgary. For those that don't, its about a 3km long steady climb with a max grade of about 10%. Here's a great graphic that describes the hill:Anyway, I thought it would be fun to see how well (or how poorly) my bus could climb. Starting from a dead stop at the bottom and accelerating normally I can hold 70kph (speed limit is 80) with the pedal to the floor in third gear. To you long time bus owners & drivers, how does that sound? Normal? How would you climb this hill? i.e., what gear & speed? I know these buses are slow but I often think that mine should be a bit better at climbing than it is. We do quite a bit of camping in the mountains and there's one hill that I need to downshift to 2nd for. Perhaps I'm worrying about nothing but I thought I'd check with the gurus here.

P
Thanks!