My dc is having a party with a large number of children, in a place where it'll be hard to collect presents.
As a parent would you be really knarked if when asking what to get as a present you were greeted with the response (bear in mind the parents of course know the exact details of the party) -
'Due to logistics of the party it'll be really hard for us to collect presents. A card would be lovely.'
This would only be said either verbally or email to the parents who contact me to ask, which some have started to do.