Ahh dig/survey bags. Each one can be as unique as the person they belong to, but one thing is for sure; most of them have much of the same thing, along with the added things unique to the person who owns it.
In my own experience, my very first season at a dig (A student dig here in San Diego.) I used a suggested beginner’s carrier: a big bucket, the ones you can get at Home Depot. My next season out I graduated to a backpack, one that was lying around, a Sierra Club backpack, and donated my old bucket to the school’s supply of buckets. In between my second and third (And alas, last season with the school. 😦 ) I took a survey class that required our going out on a survey over two weekends, which called for a sturdier backpack more suited for long haul/outdoors things. I got a very nice canvas hiking backpack from a local sporting goods store. After that, it became my survey/dig bag. While spending hundreds of dollars isn’t necessary, the one I have was on sale, reduced to $40 from $90. The cheaper ones, like the ones organizations send out as gifts, work fine, but, and I’m saying this more to people who are reading this who might be just starting out/interested in starting in a career in archaeology/serious interest in it, it is worth it to get one of the more sturdy ones. Sporting goods stores are often times having sales, so finding a good one at a decent price shouldn’t be too difficult.
Onward to the spoils!