snazzy we got it on the 'get 2 nights free if you buy 2 or more nights' that was supposedly running in January but seems to have been ticking along quietly ever since.
We also combined it with kids under 7 go free - at the time there were kids under 12 go free for other dates (not summer holiday though!) - ds1 will be 8 and ds2 will be 5. However, by checking on several different websites, when we bought it through expedia, the price was the same when we put in ds1 as being 8 or as being 5 - other big sites were carrying the disney offer but they were charging for ds1 (if I put ds1 down as being 5 in them, the price dropped). So we effectively got ds1 in for free as well as ds2.
Also - dh through work has a cashback portal a bit like quidco, which had 12% off expedia at the time (seems to be something that comes and goes quite a lot, have seen similar discounts on quidco or maybe just 5-8% but it all adds up when spending a relatively large sum like a holiday!).
And it just so happened that when I happened to look, there had obviously just been a run on their 2 hotels as the 3 ones were coming up just below or a smidge above (like £20 in total for the 4 nights) and had the advantage of being closer for walking and having a swimming pool so making it more of a holiday thing as we were going to be there for a few days). Prices kept changing every time I looked - even between looking in the am then at lunch time then in the evening.
So just jumped when it seemed particularly good - we went for the sequoia lodge one, overall paid £802 and when I recently checked the full price it should have been £1896. That also includes 5 days of park tickets.
Because of the ways the deal worked, it has meant that it would have been more expensive to go for 3 days than 4, and 2 days would have cost us the same.
Previous when we went I booked through World Travellers - they have a specialist department that does DLP and if you told them you had seen it through Travelzoo you got an extra 5% off so we managed to get a kids free under 7 (as they then were) with 50% off and then another 5% off that price - it was a flash sale that lasted for just a couple of days. Worth talking to them about it as they popped up every few weeks - sometimes with 25% off, sometimes 30% or 40% and occasionally 50%. That was reasonably late booking - July to go in august. And I was actually in the middle of looking on travelzoo to see if they had any ferry deals for another short hop we were doing over the channel when I saw the offer - we had been discussing going but deals weren't that great when we talked about it so booked something else. And then we we saw it come up at a good price for just a couple of nights thought sod it - and went for it. And the dc really enjoyed it, and we did pretty much too.
We also took advantage of the 3 days worth of park tickets by driving down the day before, staying in Reims which is about an hour's drive away, if that, so we got there at about 10am, rather than having a really long drive and ferry trip and wasting most of the first day travelling. Then on the way back we did the same thing - stopped at the same hotel in Reims having had a full day at DLP, had a little wander around and explore, then drive back up to Calais the next day, spend some time getting lunch and wandering around the massive shopping centre in Calais (albeit traffic queues meant that the reality was a mad dash into the hypermarket, grabbing at food to make a picnic while we waited for the ferry and stocking up on a few essesntials like wine and cheese whilst I moaned about how we were supposed to have a couple of hours here rather than the snatched 30 mins we had.)
oops sorry, realised that was a bit long 