You can confirm that by powering up the Wally with the satellite disconnected.
This is my plan over the next few days.
I am also wondering if there is a particular sequence I need to do when turning everything back on. When I get ready to travel I turn off the Wally and then turn off the EHD and unplug the EHD. When I start back up again I turn on the Wally and once it boots up I turn on the EHD. The Wally wil have a popup that says a hard drive has been connected and the Wally has to restart. If I have a satellite signal everything works, but if there is no satellite signal it does not.
When it does not work my shows are show in the DVR guide, but I cannot play any of them. It either continues to search or it pops up saying no recording available.