What year Camry? How much did you put in?
The “Flex-Fuel” is corn-based ethanol, which most gas contains a certain percentage of these days. The main problem with using it on non-flex fuel vehicles is that it is corrosive to some of the fuel components, but this is more of a long-term risk and a single partial tank shouldn’t cause serious problems. Draining the tank would definitely be playing it safe, but I’d say if you made it home from the gas station okay, you’ll be fine just burning it off and slowly diluting it by frequently refilling it with regular gas.