YEAH, man...I always have backup gear too (module, Zendrum, batteries, merge box, cables). I have been using the Muse Receptor, and it can be a little trying at times (usually my fault!) so my Roland TD-20 has been in the truck just in case. Never had reason to use it (fingers crossed). Since the -20 is WAY too cool to be just a backup, I just bought a used TD-6 which will be my new backup rig.
*Anyone looking for a LIKE NEW TD-20???