Howdy Jess, welcome. Found the thread with the hill climbed with a 44T rear sprocket. went up this hill with some help peddle great! Cant see it real well, but is a good sized hill. http://motorbicycling.com/f15/wickham-park-3482.html
Can get a lil more climb with a bigger rear sprocket, but try the stock 44T first and find out what you like best. Going bigger will lose MPH but give you more "UMPH" on inclines.
Awesome vid Fair! Man I wanna ride there.