Archaeology is a tough business, and certainly not for those who crave either their creature comforts or a healthy bank balance. Spending months living in a fly-blown tent in the middle of the Sahara, or up to your knees in mud digging up tiny fragments of flint in the Outer Hebrides, all for the sort of pay packet that would provoke workers in most other industries to walk out on strike - this is neither a comfortable nor a renumerative career.
Not strictly true. Just make sure you don't marry another archaeologist.
I prefer a hardhat for hot conditions. Keeps the sun off but lets air circulate.