How do I keep myself from getting homesick?

Next week I am going on a vacation with my grandparents. We will be gone for 10 days. I am really excited about going because I've never been on vacation, I am seeing some family who I haven't seen in a long time and I am also into photography so I know I will have some good photography opportunities where I am going. But, I am worried that I will become homesick, and really miss my mom. I have never been away from home for more than a week and I have never been away from my mom for more than a couple of days.