Congrats for nursing for a year! As one poster said be sure you really want to wean! Weaning is a process that takes some time if done safely for mom and baby. And nursing is a special activity and bond for you and baby as well.
Some thoughts: First, I am a Lactation Consultant. If you want to wean (in part) so you can have alcohol - then rest assured you CAN have alcohol. Per Dr. Jack Newman (one of our esteemed breastfeeding experts - you can find him online all over the place!) unless you are falling down drunk and aren't safe to HOLD the baby - you can nurse the baby after drinking even if you are hella buzzed.
People misunderstand the whole concept of alcohol in the body when it comes to breastmilk. The alcohol content in your blood is the same as in your milk - so if you are at .08% blood content that is what is in the breastmilk. That is what baby drinks - not the 15% in the beer you had or even the 80% in that shot of Jack Daniels. :) Just that .08% or less. That is 8-hundredths of a percent! So think about the fact that the baby gets at most .08% - her body will then process that down to next to nothing - there is no problem for baby. Baby will NOT catch a buzz or get drunk. Imagine how excited the moms in my support group were when they were given THAT information! :) GO ahead and have a few drinks - enjoy yourself. Baby will be FINE. Besides - you ever hear Dr's tell moms to have a glass of wine or a beer to relax while breastfeeding?? I hear it all the time. :)
Even with caffeine - you just watch the baby - too much gives you a jittery kid - but you may be able to have some in moderation without affecting the child.
Now, on the cruise you may actually want to continue nursing for a few reasons. The milk you bring for back up will need to stay frozen until you use it. This may or may not be possible. Your milk will only last a few days with this type of travel if simply refrigerated. It would be a shame to lose any due to a mix-up or lack of refrigeration. The foods that you may be around may not be what she is accustomed to - the water may not be safe - she will need something to drink - she will have easy access to you if you are still nursing.
If she needs comforting due to strange surroundings, too many people, over stimulation, not enough space to run etc., it will be SO MUCH easier to comfort her at breast than any other way...just a thought. Also, lastly, sometimes people get sick while traveling. It can come from anywhere - your daughter will be well protected from illness and/or stay less sick if she does get sick, if she is still nursing.
If you are worried about nursing in public on a cruise - please don't. If someone else doesn't like it THEY can go away, avert their eyes - they can be responsible for themselves - YOU are NOT responsible for anyone else's feelings or comfort other than your and your baby's. And in Mexico - most people breastfeed - at least that is what one of my LC buddies down there tells me. :)
Now - if you still decide to wean before the cruise - take your time and be safe. You don't want to rush the process for you or your daughter. You will want to wean gradually to avoid plugged ducts and mastitis and to not upset your daughter. The feeding that is most important to her should be the last to go. "Don't offer don't refuse" is a good rule of thumb for weaning a young child - in other words, don't offer the breast - but don't refuse if she asks for it. You can use some distraction techniques if she does ask but if she insists then you sit down and nurse. You don't want an emotionally painful weaning when you have had such a beautiful nursing relationship. :)
If you have any other questions you are welcome to call...###-###-####. Otherwise I wish you luck with your choices! Enjoy your cruise! Sounds like fun!
Take care...
J. Simpson, IBCLC, CIIM