hey TTOY, you mentioned you want to use Reason live and are a bit weary of taking the ignition key on tour with you. I've never used anything but Reason live since 2009 (when I joined) so maybe you can find some assurance in this.
I mounted a 7 port USB hub into my rack (physical rack, not reasons rack) and keep my Ignition key plugged into that. So, it always stayed plugged in (until I need to update the licenses). The part about this, at the moment I I use 4 USB devices and plug them all into the hub and then only have 1 USB ran to my computer. So it doesn't look messy and I can hide the hub in my rack.
Really though, the main point is, now that you have your Ignition key working, don't let it hinder your use of Reason live!