A very small amount of oil weeping is not a huge problem but it it drips or runs you owe it to your fellow riders to get it sorted before going out. Do you really want to risk your weekend by failing tech? I'd suggest picking up the needed replacement parts, o-rings and seals are dirt cheap. Keep a careful eye on it between sessions and be prepared to service it on site. It takes less than 45 min to remove the push rod, lip seal and o-rings and replace them with new parts. I always remove the push rod from the clutch side extracting it along with the pressure plate. Reassemble the same way generously lube the lip seal and o-rings with grease and gently feed it into place.