Your battery won't last as long if you use your iPad to play games for long amounts of time. However, you are able to increase its like by stopping the vibrate characteristic used by several shooter or racing games. If you simply spend a couple of minutes at any given time playing these activities, it's fine to leave this feature on. Else you can buy the iPad car charger and use it later to charge your iPad.
If you use the Apple product iCloud, you will be capable of finding your iPhone or your iPad. Go to the iCloud website, log in and you will be able to identify telephone or your missing iPad on the map.