I carry a External HD for backup. If my other show that uses the MTU portable pc is not in use, I can go home and pick it up and be back within 20min.
I had my portable pc go down one night due to a power failure during boot up. Could not get it rebooted (had some corrupted files). Just lucky to have my laptop in the van so the show went off without a hitch. It does not hurt to have a spare if you can afford.
