It's not the alarm. It's the 2:00 in the morning, rolling over, wanting to see what time it is. Instead of a quick glance at the nightstand, I have to fumble for my phone and hit a button. And we don't like to bring every electronic device we own with us on vacation--no iPods, no iPads (don't own those anyway!), no laptops. We bring phones to keep in touch with each other in the parks and for checking FPs, wait times, etc. Otherwise we try to use our tech stuff as little as possible.
And your kids throw the alarm clocks? Guess I'd rather have them throwing the alarm clock than my expensive phone!