Seeing that you are going to pull the rocker cover off, I have a couple more tips for ya. I assume you will be using the service manual as you go...? You'll need it.
First thing you should do is pull the valve covers off (when you get that far during disassembly) so you can watch the rockers move. Then take both plugs out of the left side cover and rotate the motor with a socket & ratchet until both rockers are down and stop moving, and you feel compression stroke resistance coming on strong... Then loosen the valve adjuster locknuts and back off the adjuster screws a couple turns or so. These steps insure that the cam lobes are facing down and the rockers & cover are not being stressed by the valve springs, which can cause the cover to cock and jam on dowels and bolt shafts (& possibly become warped) as you take it apart.
Another little issue you may have to deal with, may be seized up rocker cover bolts. If you encounter any that feel like they might snap off while loosening them in the pattern that the service manual shows, stop right there and think about it... sometimes tapping/hammering on the bolt heads will jar seized threads free, other times it won't be enough to save threads and/or bolt. Drilling and tapping out seized and snapped off bolts is a bugger on those, so use caution when taking them out.
Clean all mating surfaces well using alcohol or other drying solvent so your gasket sealer will have a good bond.
Adjust valves following the procedure in the service manual when it is back together,
Enjoy your work!