I agree with the other posters, travelling with the newborn is the easy bit, it just takes a spot of planning. You can take sterilized bottles and tetrapaks of pre-made formula if you're not bf.
I went on holiday with The Boy at 5 weeks, wouldn't have missed it for the world but I completely failed to anticipate how hard I would find it to relax in those early baby days - hormones, me and baby still getting to know each other, worry about eating/sleeping/routines, still trying to bf. I enjoyed seeing my family but was exhausted by the time I got back. My tip would be not to plan to do too much when you are there or expect too much of yourself!
I went on holiday with The Boy at 5 weeks, wouldn't have missed it for the world but I completely failed to anticipate how hard I would find it to relax in those early baby days - hormones, me and baby still getting to know each other, worry about eating/sleeping/routines, still trying to bf. I enjoyed seeing my family but was exhausted by the time I got back. My tip would be not to plan to do too much when you are there or expect too much of yourself!