Griddle use on the outside of camper do you or don’t you use yours

I remember when I got back into rv'ing and bought a tent trailer it had a rvq that hooked on the side.  I never did use it like that, I always used the lefts and put it on a stable surface away fromt he camper.  even if it doesnt get to hot, it has the potential to stain the side from grease or what not smoking off.