As stated above, how easy/difficult depends on the baby’s temperament. Our first was a good baby and nothing phased him so holidays were a pleasure…the second not so much (to say the least) so we had to arrange everything around her sleeps and feeds.
We did many holidays with them under 2 to get the free flights and my advice would be always self catering when it’s warm and not hot, the Med in spring/autumn for example. Life is so much easier when you’re outside all the time.
You need not pack that much for the baby as there are always shops nearby, enough nappies for 2 days and not the entire holidays, don’t bother taking all that sterilising crap as there’s always boiling water to sterilise. We see some people taking car seats abroad which is just crazy as most taxis/car hire will have these if you ask beforehand. We had a tiny pop-up cot that would go on the floor which worked well.
Go for it….and when the baby starts screaming in a public place most people will sympathise and those grumpy buggers who don’t were grumpy babies themselves once…