Lukenick1; I wouldn't use less than 12 ga on 100 ft. And don't use heavy power user like A/C and Microwave. There would be to much voltage drop.
There's a saying; Pay me now or pay me later. So better invest in a proper extension cord.
2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-6500 lbs.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power
ALJO 'Forever Young @ Heart' provide on their travels Music Entertainment to Senior Care Homes