I have an acquaintance, Tara, with the "unrealistic grasp of entertaining" problem. She doesn't seem to realize that it takes more than decorating your house nicely to make a nice party. You have to put food and drinks on the table. You have to provide some form of entertainment. You have to make people feel welcome and not chase them around your house, reminding them to wipe their feet, use coasters, avoid sitting in the "nice" chairs, those are just for show.
Tara would host 30 people and only put out a two liter of soda and a plate of cheese and crackers, then gripe that people always seem so eager to leave her parties and don't show gratitude for her hospitality. friends have tried to gently tell her that people might be willing to stick around if she offered more food or drink or maybe stopped treating guests like they were furniture-smudging burglars. But she said that she has the right to keep her home nice and if people want extra food and drink, they should bring them.
Other people in the group, with less "magazine perfect" houses, but the foresight to put out an abundance of delicious food and drink, provide games and activities and relaxed, fun atmosphere, host parties at their homes. And Tara gripes because their houses aren't as nice as hers, but people act like they're having a better time than at hers.
She wouldn't listen to suggestions from others and eventually people just stopped going to her house. With Lakehouse Sally, I would just tell her that you're going to continue with your holiday as planned. And she can continue with hers.