I’ve done just this fairly recently, took my baby and 3 year old away for a few nights all inclusive. I thought I would make the most of being on mat leave. In all honestly, there were a few nice moments but it was mostly chaos. Given you’ve already paid, I would probably go but be super organised.
Things to think about would be how good at walking is your 4 year old? Do not underestimate how long the walks are at the airport. I used a double buggy and a sling for the baby, as we didn’t get the buggy back at the other side until we got baggage. Double buggy was essential and gave me extra storage too. Meant it was quicker than walking with a slow kid dragging their feet.
How will you manage suitcases and a buggy? I took one big one to check in so I could push the buggy with one hand and case with the other.
The worst part for me was that we were all in the same room to sleep. You need a plan for separating the kids so they sleep. Mine messed around so much as they weren’t used to being in the same space at sleep time.
How will you manage to get food for all of you? I struggled at meal times in the restaurant as it was a buffet so had to leave the baby in a high chair, take the toddler with me and go back and forth to the food. Thankfully baby sat quietly but that was a pain and I had never felt so alone. Much easier if it’s table service.
It’s a real chore getting all the stuff ready and everyone with suncream on. Being used to having an extra pair of hands really showed when trying to get out of the house.
A swim seat was brilliant for the baby, he was safe bobbing around with me playing with the toddler. Don’t buy a cheap one though, Zoggs one I would recommend.
Have you looked at what times the restaurants are open? How flexible are you with nap times? Our restaurant didn’t open until 6 so I had to feed baby, put him to bed in the pram, then take older one to dinner.
Small details - get a round the neck or bum bag for passports, boarding passes and your phone so you can easily reach them in the airport.
Let me know if you need any more tips! Hope you have a great time. Just don’t expect too much.