My company operated up to 11 Aerostar 600 and 601's as "birddogs" (ie aircontrol/lead planes for aerial firefighting ops). The company SOP was no operations into airports shorter than 3000 feet under any circumstances.
I have a bit of time in the 601P and found it even more of a runway hog than the lighter unpressurized versions. I also think the takeoff data charts are a complete fantasy of the marketing department and I have never been able to achieve anything close to the book numbers.