This checks out from my list back in 2019. Nice work! The only thing I'd add would be FIPG gasket maker. I bought OEM, but another gasket maker would probably be fine, too.
1. Valve cover gaskets - Part #11213-62020 - 2 Total
2. Spark Plug Tube gaskets - Part #11193-16010 - 6 Total
3. Intake Plenum Gaskets - Part #17176-62040 - 2 Total
4. Washer Seals - Part #90210-05007 - 16 Total
5. Camshaft Plugs - Part #11188-62010 - 2 Total - order
6. Halfmoon Plugs - Part #11183-62010 - 4 Total - order
7. PCV Valve Grommet - Part #90480-18001 - 1 Total - order
8. Toyota FIPG seal packing - Part #00295-00103 - 1 Tube
Edit: $300 seems pretty fair for labor for this job. Took me a weekend doing it my first time, taking my precious time.