I'll be there, probably around 6 and would be happy to run you through a few demo games. Yes, you just need Imperials (and you can play Imperial vs. Imperial or Rebel vs. Rebel-- that happens all the time in tournaments).

The core will give you two TIEs and with your two Firesprays you should have plenty of options at 100 point lists, but for demos might just use two TIEs or 1 FS.