Advice and tips please

We are looking to go on holiday late September this year, our little boy will be 15 months old

We are based in UK and only looking to travel max of 4 hours flying so somewhere like Greece or Spain. We are going for a week all inclusive.

Any tips regarding toddlers and holidays? What to do what to take etc

He is not walking yet and I’m trying to fully transition him onto table foods (he’s currently 13 months) he super hyper and a climber. He still breastfeeds at night and naps if I am there or he will drink cows milk out a bottle. He loves ice cold water in a straw cup.

I feel like I will pack toooooo much stuff, I suffer with Post Partum Anxiety so it’s stressing me out a bit.

I don’t know what you are supposed to do in regards to bottled milk on the plane?

I have a travel system pram so think I might need to buy a lightweight stroller?

How did you guys cope with taking packs of nappies, toddler snacks wipes etc with you ?

I’m stressed out about the journey from airport to hotel in taxi with no car seat, ours is one we cannot take with us

Please share your wisdom and holiday advise