LMAO He removed the kief catcher thing magiger from a grinder?!?! What the hell man?! That nearly defeats the purpose of having a grinder in the first place...
Eh, we were all noobs to smoking at one time or another, just be a friendly stoner and show him the ways
To your situation about driving to the festival stoned... Well there's probably gona be a lot of people there, so I don't advise smoking after a 3-4 month t-break and driving in a very crowded area with a lot of police... That does NOT seem smart to me... Believe me man, you're going to be very, very stoned after that t-break... Like when you first started smoking weed...
I'd say either A. Save it and somehow smoke it in the parkinglot/in the festival/somewhere safe around. Or B. Have an experienced toker/driver roll down there and spark it on the way...
Rule of thumb if you are adiment about tokin while driving.. Don't bring any more than you can eat.