Going on holiday with the in-laws shortly, no problems there as we get along and always have a good time.
The last time they came with us I only had 2 DC's...now I have another 2 and they will be 2yrs and 7months.
We are heading to Florida and it was suggested by MIL that me and DH take the older 2 DC's to the water parks and leave the 2 little ones with them at the pool.
Now I'm not happy at the thought of this as the GP's can't swim, FIL walks with a stick and my 2yr old runs fast lol
I don't know if I'm being precious or not
as I'm sure it would be fine but I have images of them paying attention to the baby and my toddler jumping in the deep end.