I am in the business right now for the past ten years, but work for a team and not a driver. Last year 150 duty days/325 hrs 15-20 overnites. Most trips out and back, except west coast races, PHX, LAS, ONT, APC. NASCAR has cut back on the testing to 6-8 tracks during the year. If you fly for a driver, it can get brutal if you do not set limitations, unless a 3rd pilot is hired or contract pilots are used. Then you need to make sure you can trust the individuals you are using.
It all basically comes down to the organization as in other corporate flight departments. If they are family oriented with good management, etc. then most times it will be a good place to work (QOL). Salaries are more competitive now with nicer equipment.