Looking for an offbody back pack for a supplemental pcc with OAL of around 19"

Been having a hard time finding what I can use that would allow a small assortment of hand tools for my job, a weekends worth of clothing, while still allowing good securement of a pcc. I can find a good bag for just the firearm and stuff, or a bag just for everything else without the firearm. Wondering what people may be using that is space efficient and fits everything I need.