I took a moment to test out meshroom mixed with phone camera photos. I took roughly 130 photos with my phone around the backpack (still missing some vital spots and information actually) and pushed them into meshroom. The results look promising for phone camera photos (I sport Sony Xperia XZ2 at the moment).
I also took some time to prepare a low poly, and check out cleaning lighting information with Substance Alchemist/Designer combo for future reference.
Renders are from the photogrammetry mesh rendered in Marmoset.