Cam lobe going flat...what now?

2. What kind of clean-up is required prior to stabbing a new cam in? The Marine Corps has me TAD to Florida for 6 months away from my garage and many of my tools so I’m really hoping to get by without pulling the engine. I’m hoping I caught the problem early enough to prevent further damage. If the cam bearings aren’t damaged can I assume the main and rod bearings are good?

I would drain the oil and look at it. Pull the oil filter and cut it open and inspect carefully. Then choose a course of action.