Put her to bed the night before in travel clothes then get yourselves up and the car fully loaded before lifting her last minute from cot to car seat. If you put a hot water bottle on her seat as you load the suitcases the seat will be warm and you might get away without waking her at all.
Don’t take anything irreplaceable if you can possibly avoid it, but if she has comfort items then keep them with you not in the hold, and label them if you can (cable tie with your address label around teddy’s neck).
If she’s used to a particular cereal or fond of a favourite snack, pack some. Take nappy rash cream and calpol and insect bite cream and plasters. Hopefully none of it needed but you don’t want to waste a day trying to find a pharmacy if it is. Sun cream and after sun too.
If your buggy folds then different airlines rules vary but you may be lucky enough to have it in the cabin and therefore ready for when you get off the plane. Otherwise it may have to be checked in - take a sling or a hip carrier so you can hold her easily. If you have a cloth sling you can use it to keep her safe in a dining chair too and corralled on a coach/bus transfer.
Put one of you in charge of her and the other in charge of passports and tickets etc.
Pack nappies across all your luggage not just in one suitcase in case one gets lost!
And take things slowly once you’re out there. She’s going to be interested in the stones and the gravel and the rubbish bins, in jumping in the tiny puddle and watching a lizard, and probably won’t care at all about all the things you’re interested in. So just enjoy the holiday for what it is.