Travelling Budget

To parents who bring your kids overseas to travel as a family, do you save now and enjoy later or enjoy now and save later? If you saved before your trip, how much do you budget in? Just enough for your trip's expenses, or do you budget some extra for food, gifts and unexpected expenses during your trip so that you still have enough spare cash when you come back? If you take trips without saving beforehand, do you end up not having enough money after your trip, or do you have emergency funds saved up in your bank as backup?