Vacation with a newborn?

Jeanette • Married the love of my life 4/18/15 & got BFP 4 days after missed period mid morning 10/7/15 expecting 2nd child❤️👶🏻🎀
My hubby and I have been planning a trip with our 10 yr old to Florida in the summer...havnt made any reservations yet but we've been talking about it since before our April wedding...instead of romantic honeymoon we opted for a trip to universal and Disney in Florida with our son so he can go b4 he's too old to be entertained & now we are pregnant & due mid June....if we go in August b4 school starts for him baby will be 2 months old so we can't leave behind but we don't know about taking with us 😕 & we definitely don't want to cancel the trip! Have any of you traveled by plane w newborn & been on vacations? If so how was it? 
...as it is we may have to take one of his older cousins to ride w him b/c hubby and I get nauseated lol