and you could drop it under the cams.
exactly...that royal purple stuff is extra slippery...
You'd kinda have to force it down a little to lose it under the cams, but either way, just use something magnetic to pick them up. Any mechanic that I have ever met has a little magnetic rod that's useful for picking up dropped bolts, screws, etc.
Most screw drivers are magnetic also, so once you loosen it with an impact wrench or socket wrench, just pick it up that way.
And one more thing. Don't work on the engine when it's hot/warm like I (dumbass) did. I bent the oil feed pipe and couldn't get the head cover back on, but luckily I had my GF's dad shave it down and bend it back. If it weren't for him, I would have had to buy a whole new head cover for $300 bucks.