Havin' fun while freedom fightin' must be one of those lunatic Texas traits we get from the water - which is known to have lithium in it - because it goes all the way back to Sam Houston surely the most lovable the most human and the funniest of all the great men this country has ever produced.
Even if you're improvising the fact that beforehand you know certain things will work helps you make those improvisations successful. It really helps to have a certain amount of knowledge about musical structure.
