I called
DCL today and received the following info:
1) Ship departure from Port of LA is 5 pm local time. With Guests all aboard time of 4 pm, that tells me the Muster Drill will likely be at 4 pm so they can get it over and people can get ready for the sail away at 5 pm. Given that, I think it'd be good to move the Meet & Greet start time to 2:30 pm. Folks can obviously come and go as they see fit. Susan and I will be boarding early, eating lunch and then we'll head down to the Promenade Lounge as soon as we are able to drop off our carry-ons in our stateroom.
2) Puerto Vallarta - the Canopy Tour start time made me scratch my head so I asked what our arrival time was projected to be - it's 9 am. Given we pull right alongside the port and hop off, it all makes sense now. I would guess we have the all clear to go ashore by 9:15 am.