We got a brochure with an offer of 35% off today, I think this is for next year, and supposedly we would have 40% off if we were to book for half term (I think I would have to phone up to pursue that).
I note that Al Fresco does 50% discounts if you book more than one chalet, and it might be possible to book in conjunction with another family (this would take some thoughtful planning and arranging though).
I can also get NHS Eurocamp discounts, but I think they don't combine.
Does anyone else have any ideas how to reduce overall cost/ spend for this sort of thing?