You can still print badges and check in attendees without internet.
First, you must originally have a connection established with your surf stick and iPad.
If you become disconnected from your surf stick at any time, you can go back into your iPad's settings and go into the WiFi options. Select the network you were using with your surf stick.
The cradepoint router's IP address page will appear and as you to either continue without internet or choose another network.
Select continue without internet.
Now, if you go back into the Boomset app, you will be able to continue printing badges.
***Note: you cannot add walk-in attendees without internet.
***Note: you cannot log out until internet has been restored.