I have to be honest, I wouldn't have my dd do anything. When we vacation (Disney World), she gets plenty of walking and swimming. That's enough. Granted when we are away she does a lot walking on her hands and she tumbles here and there, but it's not structured by me saying oh go do this many sit ups or pull ups or such.
Honestly as long as she has 2 weeks from when she returns until when she competes she will be fine if not better (because her body has a little rest and she is raring to go). You'd have 1 week to work out the kinks and then another to get meet ready.
If our gym can close down the from 8/27 - 9/4, then I am pretty sure that she can survive a vacation without doing anything (structured or told to do). By the way they also close down the last week of June and they get right back into things when they get back into the gym.
It will be fine, you'll see! Let you dd have a relaxing vacation and she will step it up when she gets back in the gym.