I have pumps and mechs in my bag. Always have my pump on hand for the simple fact of 2 hours left with 100 rounds on hand and too cheep to buy more. Still fun day.
I get crapped on for my large bag but I have 4 or 5 markers in it. One breaks down and all i need to do is grab another. On a occasion i let someone borrow one.. nothing like hearing multi ATS firing on the field.