Photo day pack - Matador Freerain 22 Waterproof Packable Backpack

Bought this pack to serve as my light packable day pack, while on tour. Use it to carry my 2 OM-System camera bodies with attached lenses. While it is very light and packable, would like it to have some additional built-in bottom and side structure. I had to add flexible photo pack deciders to accomplish this. I just not comfortable using the pack for photo equipment without third additional structure fans support. Waterproofing worked well on a rapids trip. Just need to be sure that the waterproof zippers on the main and front are completely closed.