For our test run, we headed up to the NCR trail and just did the first 2 miles and then turned around and came back. Hannah did pretty well and seemed to have fun but she got fussy within about 20 minutes and annoyed with her helmet which kept sliding off to one side (kinda defeats the purpose of a helmet, huh?). We're considering this a successful test run, and we now know what kinks we have and how to work them out for smooth sailing next time.
In the meantime, I'm going to start riding her around the neighborhood, to the playground and library and stuff, to try to get her used to riding and wearing the helmet.
Here's us hanging in the grass while Eric put the bikes back on the Jeep. Eric realized the blueish tint at this point and fixed it. Yay for one normally-colored pic!