blimey, grandparents will LOVE DLP just as much as the children will
Plan your days well - get a parc map and plan your way round, dont just walk aimlessly
Take bottles and refill with water from fountains to save money - drinking water in the parc is as good as in the UK, in fact better
Pinch a few bits for lunch from breakfast but dont go mad or you'll get stopped
There are many places to eat inside DLP, form service to buffet. Burgers, pizza etc. We enjoy Woodys Cookout and it tends to be fairly quiet, even in high season as it is on the other side of the park
As far as I can tell, there are no French school holidays at the time you are going and UK kids are at school as well
For a wealth of information you'll find a very dedicated DE, figgygirl, here
http://www.tripadviso...ne_Ile_de_France.html
Check the TQ box on the right hand side of the forum - everything you could possibly want to know
have fun! I love DLP and am a mum of an 8 year old and nanny to 2 under 2's =)