1) Have less stuff, especially clutter (blankets, the baskets the blankets go in, etc). On vacation, the places are more sparsely furnished and you bring fewer possessions - it actually makes it more fun.
2) Have a big "backstock" of party materials like drinks & snacks. You can always order takeout (and do at the beach)- having enough wine & cheese for an impromptu party at all times brings me a lot of joy and makes it easier to host;
3) Stop doing chores all the time. We do chores on Sunday afternoons, but otherwise hold off