Thought I would add a few more. At Royal Pacific they give out little containers of sunscreen at the pool. We always stash a few for use at VB in the parks, etc. Just a little thing but one less thing to pack. Also, towels and chair covers from the pool we have asked and been able to bring to Volcano Bay. Room towels are smaller. Volcano bay charges like $5 each to rent.
If you are at Royal Pacific and want to make a reservation at the Palm at HRH or a fine dining place at Portifino, you get free limo service. I would assume it works at all the onsite properties but can't say for sure. Go through the concierge. Kind of a neat treat.
Some nice little tips!
This is probably the right thread for this while I'm here. Do Universal offer late admission to the parks while staying on site, whether this is something that's coming or used to be a thing?