I would also suggest a florescent lantern for the room for the odd power outage, and anyone would LOVE to have it left behind for their use!

Also, grinders can be found on the island, but they run pretty high, so if they are cheaper in SoCal, by all means get one there and bring it! I bought a wooden grinder that didn't really do jack so I left that one behind, but the metal one I bought there for $35 worked so good I had a friend clean it so I could take it home with me, lol! One thing I always take with me is a hand roller (for tobacco, right! ) and some packs of matching zigzags, it's fun to roll a pack or two up then place some hand rolled 'cigs' in my ciggy pack..

Also, if you are worried about insect bites, go with the avon skin so soft 2 in 1 sunscreen and insect repellent..although I really think that bugs can vary based on time of year..last time I went I just used my spray sunscreen and every now and then in the evenings added a little repellent spray..but when I go in August, I know the bugs can be pretty bad so will come loaded for bear where that's concerned, lol!