Because you'll be away from home, you're going to use a lot more data than you normally would back home.
You could easily use up 100MB or more just from a quick look on Google Maps, a browse on Facebook or checking email.
Consider also that you won't be connecting to your usual home Wi-Fi, so you'll be using even more data.
On the USA Canada and Mexico Max Plan you can hotspot your phone so you'll be able to connect your laptop too, and share the phone's data.