I like YABF Shall be using that myself sometimes.
DH and I were seasoned travellers anyway before DS - we have never spent our spare money on booze, cigarettes, clothes, take outs, gadgets etc. - we spend it on travel. There was no way we weren't going to travel abroad with our DS as that is just what we do IYSWIM.
So far with our 22mo DS we have headed abroad to Majorca, Egypt, South Africa and Mauritius. We're heading to Ireland, France and St Lucia this year. I'm expecting DC2 in Sept (all being well) and we're planning a trip for early Jan with both DCs. Only one of these trips was with grandparents to help, and that was the most stressful as we were having to deal with them as well as us and DS!
The hardest two trips have been to Cornwall and Northumberland as DS was strapped in the car for a long time and that was hard - on planes at least he can clamber over us, wander around, watch the other people, play with different toys etc.
So many people said to me "Why would you go abroad? Your DS doesn't care which beach he's on so just go to Cornwall" To which my response is always "Well if he doesn't care which beach he's on, we'll go to a beach we want to be on"
But maybe it goes well because DH and I are seasoned travellers so know that there are good times and bad times to go to places, pick the destination carefully for suitable hotel/beach etc. for our child, don't overestimate what DS is capable of, know all the tricks that work for us to get through flights easily, and have been able to plan the best way to do it with DS so we have all we need and therefore don't get stressed out. I can honestly say all our foreign holidays have been pretty much stress free, and in fact our last holiday to Mauritius was the best holiday we have ever had (and we've been on lots of holiday!) as we all just relaxed and enjoyed it so much. No way I would trade this in for Cornwall for the next 18 years! And DS will be learning loads from being abroad as he gets bigger.
I may sound smug, and know I will probably have a horror holiday at some point in the future, but travel abroad is just the way holidays are for our family. YANBU - your money, your holiday, your choice - but I do find it a little bit sad that your kids will only be seeing the inside of CentreParcs for the next however many years Travel broadens the mind and all that!