This cache is the 31st spawn of "Mothership". (GC2QZZN.) An Alien spacecraft that crashed in South East Michigan.
This little fella hitch hiked back to Virginia in Pick6's errr... uhhh... Rucksack.
The cache does not need to be moved from its location in order to sign the log. Simply remove the top, and extract the log.
FTF prize is the Space Critter himself.