Scott3: Other option you could consider is a big inverter to run off your car battery (with engine running). For example $321 buys this 2000w modified sine inverter (4000W peak). These inverters are have non momentum so are really fussy about starting current, but my gut feeling is 4000W should be sufficient. Under 1/2 the price of the generator, and with minimal storage & mantaince requirements this looks good on paper. - I don't know if this comes with battery clips or if you would need to make them up. Haven't tried to run a saw off an inverter myself.
Thanks, Scott3. Do you have a link for that inverter?