In my [former] territory we have a large shopping mall where soliciting is not allowed. But, of course, WE were instructed that since it was such fertile territory for informal witnessing and this is GOD'S WORK, we had to look like we were shopping, not preaching.
So we were to bring only tracts that could fit in pockets or mags that would fit in purses. And work alone, not by twos. If we could fit a pocket-sized Bible inside an overcoat or in our purses, too, that would be fine.
Likewise, keeping their purpose from being obvious in apt. buildings, as Moxy pointed out.
So the bookbag is NOT dead, but the point might be that it IS a DEAD GIVEAWAY, and maybe some that were hiding-not-at-homes won't realize who they are until it's "too late"! LOL
Also, many ARE wise to the damage that carrying around loads of books can do to one's spine. It's not fun to have a herniated disc either out in field service or sitting at 5 meetings/week!
I, too, like your title, nojw, and may use your line on the next pair of witnesses I run into....
outnfree