We're about the same size. Depending on how much stuff you need to carry, I might suggest my old standby- LL Bean Continental Ruck. About 2000ci, maybe a little less, and in red or blue it is socially invisible. If you want to add a pouch to the top, the straps can be laced through the webbing of a PALS pouch (4-5 channels wide), and if you go with black for the red or blue it won't stand out too much.

I used mine through high school and college, for one and two day hikes, and with a few additions it was BOB for a long time. It's lost some of the waterproofing over the years, and it has a few scuffs, but no tears, no torn seams. And it's fairly inexpensive, to.