David creek is pretty narrow at its Mubwayaka end, but soon it gets wider. There's no creepy part to it, it's very scenic. Rosebary portage starts at a bridge on a wide logging road (unused, when I was there) and then turns into another forest road, more overgrown. It's flat all the way and very easy except for being lengthy. My notes are from 10 years ago.

I was through there two years ago and the creek was not a problem. We didn't even get our feet wet.  A couple of lifts near the lake, then clear paddling.  The portage was a nice, long walk in the woods.  We had no difficulty following the portage.  The bridge that was out, was crossing a creek about two thirds of the way to Rosebary.  It was fast flowing and deep when we crossed it. We had one guy jump across first and then tossed the packs across. Then slid the canoe across. And then the second guy jumped over.  We probably should of found some logs or floated across up stream although I seem to recall, that didn't seem like a good idea at the time due to the fast current.
 We looped around through the Tim river and out through Queer, Little Trout, Bice.  I found the Tim river to Queer Lake portage way more challenging than David to Rosebary.  I really liked this route for its variety and the fishing was good too.