Leak at upper timing cover?

[fishhouse4]

Just noticed a leak on my "new to me" 06 4.8is while preparing to replace my CCV breather valve and hoses.

I knew it was losing oil - added little over a quart soon after purchase (about 2 months) and it's low again. Never saw any leak on ground until a few small drops very recently at random times (and I'm not 100% convinced that wasn't power steering fluid/ATF due to some residue on the PS reservoir and hoses as well). Never any low oil light - so it's not been that low.

Anyways, I saw oil pooling on several level surfaces on the drivers side directly under the CCV hose area. While idling I can see it slowing bleeding out in the little valley/dip at the very top of where the upper timing case cover meets the block (and under the cylinder head cover. This is driver side, very top left of timing cover.

I borrowed this pics from another thread (https://xoutpost.com/bmw-sav-forums/...ve-covers.html) and added arrows and comments on them to highlight the location of the seepage.

Location of leak:



Closer view:



Can I try to just tighten those bolts? Don't have any external torx sockets at the moment (size 20 I believe).

If I need to replace the gasket, what sort of task is this for DIY? I read you can replace without pulling the valve cover, correct (https://xoutpost.com/bmw-sav-forums/...-covers.html)?

And just as important, what else should I replace while in there?

Thanks in advance for any tips and input!!!