Have name changed for this.
I bumped into a friend of mine who I haven't seen for a while. She suggested we meet up on the Bank Holiday, together with another mutual friend, and the three families could have a picnic lunch and a walk at a National Trust place.
On the Friday - all details are confirmed. We decide to meet up at mutual friends house and all leave together.
However today, an hour before the meetup time, she tells mutual friend she cannot make it - she has had a busy weekend, and needs some 'me time' - but will send her DH and kids to join in the walk. Her Dh and kids turn up 45 mins late - with no picnic - but 4 cornflake crispie cakes to share between 7 children 
. Her DH announces that they didn't have time to go the shops or make sandwiches. So mutual friend kindly rustles up extra sandwiches etc, and luckily I have also brought a few extra. However neither of us have enough water or juice for old friend's DH and children. Then old friend's DH announces he has to first stop off at the petrol station. However he doesn't think to buy any extra food or drinks.
The delays mean that by the time we arrive at the National Trust place, it is almost lunchtime. So we have our picnic, sharing everything we have with old friend's Dh and kids. As there is not enough water, we end up having to buy extra from the local National Trust cafe. Old friend's DH announces he only has £3 and therefore cannot buy his own children ice creams and water. So we end up buying theirs too.
AIBU to think the old friend could have made an effort to be more organised - especially as she was spending the day having her much needed 'me-time' anyway, and as it was all her original idea too? AIBu to think her DH at the very least could have brought some cash or took the opportunity at the service station to buy some extra food and water?Mutual friend wants us all to go ski-ing together next year - but this whole event has put me right off the idea.