For your planning just remember that most countries wont let you travel inside their borders after about 24w unless you are on a residents visa. Generally speaking its the countries more like USA, GB etc, but I dont even know if you can get travel insurance after a certain number of weeks.
Would be worth checking that out, and corresponding it with a calender before you get too far down the booking process.
I'm jealous too - I would have killed for a holiday this year Ah well - I guess it will be next year with a newborn and a toddler! Eeek!