Let me make a suggestion then on an excellent combo of items for your trunk bag and rack. The Bontrager rack you linked I'm pretty sure has the Interchange system on it. Most of Bontrager racks do and then if you get their trunk bag with the Interchange hardware it is just sooooo nice and easy to use. I have the trunk bag that has the panniers too but they fold up into side pockets when you don't need them. VERY cool bag and I absolutely love it. I have the Bontrager Back Rack II. The Back Rack I is smaller which would probably be the one for your bike if you opt for a screw in rack instead of clip on. Don't hold me to that, I'm not sure if the I is smaller or the II come to think of it. It says on the packaging though. They run about $45 and the trunk bags are from $89-125 depending on which one you go with.

The wind has been wicked there in Indy recently. Last Wednesday when I met you, I did 45 miles and it was crazy. Just be careful crossing around the White River Damn area not so much for people (you can see in every direction) but the wind there is the worst place in town You are lucky you are of shorter stature than me, you can avoid a lot of the wind. As memory serves me and IndySteel proved this one windy day riding out on the Nebo route I would pull till I wanted to barf then I'm like yay I get some relief she's going to pull, my legs were burning! Yeah, well no! The wind just went right over her and hit me anyways It was a nice gesture though, lol. That ride beat me up.