leaking smurf

I changed the oil and filter out on my new to me 1989 smurf(intro-ed here) last Saturday.

Rode it pretty good off road then noticed a leak that appears to be coming from the cam sprocket cover on the cylinder head.

So I am trying to decide how far to go with this.

"Don't fix what isn't broke" vs "ounce of prevention..." kind of dilemma.



I am thinking I will go with a Athena Complete Engine Gasket Kit from bike bandit, and just replace the one leak-er now and have the others ready to go when problem encountered.



So questions-

Does this seem like a reasonable strategy or should I just bite the bullet and replace them all?



Does anyone have experience with this particular gasket kit or any other to share?