@Haruki0 Yes Haruki I can't say I blame them! They have paid you money for your property and they are entitled to be there without your intrusion.
Obviously wait until they have left is the best advice but, all guests are different, and you really need to do this, if you offered them an incentive to forgive the intrusion...perhaps give them a refund of one night then they may feel more inclined to cooperate.....but if it were me, I wouldn't be too cooperative either.
Cheers......Rob