Lavachickie congrats on your upcoming trip.
Just got Sunday a week ago after a two week stay. And although we go alot it's just gotten to be second nature. Looks like you are on the right track.
I dive in a full 3mm suit. Unless you are really cold tolerant I would have something more than a 1mm.
Clothes lines and pins a definite plus.
Leave the gloves in your dive bag and if you dive the wreck then you can take them out.
Mark your gear with name, color, initials, etc. Makes gear in a pile easier to find.
Take a good jacket or coat. The harbor has been closed for two days and the temp was 60 degrees today at noon. That's warm compared to the 16 we've had here for the past two days but you will get cold.
Also a good windbreaker/parka you can take on the dive boat and not worry about it getting wet.
A dry bag large enough to hold dry clothes, towel, wallet, etc. Remember that everyting you take on a dive boat will get WET!.
A finger spool to go along with that safety sausage and do learn how to deploy it at 20 to 30 feet.
Pass on the seasick meds unless you plan on taking the ferry over across to the mainland for a trip. Bonnine is my drug of choice when it comes to this.
If you don't have DAN insurance get it. It's the best $100 you will ever spend. One treatment in one of the dive chambers will cost you in the neighborhood of $5,000. And no your regular insurance will probably not come close to covering all the expenses.
C-card, driver's license, passport
Spare mouthpieces, zip ties, fin strap, etc.
If you plan on or think you might do a night dive definitely bring a good dive light. The new LED lights are great. Save on a rental.
If you bring a laptop, Skype is the cheapest way to call home. From Mexico it's 2 cents a minute and if you invest in local number your family can call you for free.
If you take a camera don't forget all the extras like o-rings, batteries, charger, 8 meg card. Take lots of pictures and delete the blurry ones and fish tails. Best thing get close, really close and pause just a second before you push the button.
We weren't bothered with mosquitos at all. But it was cool. If it turns off hot you may. Easy to pack a bottle for just in case.
Sunglasses
Extra trunks
Ink pen for the forms on the airplane. Immigration and customs form.
Leave all the dressy clothes and jewelry at home. And if you take more than two pairs of shoes you will not need them.