Awesome! Wish I could attend :)
One suggestion from my experience with Qubes at installfests: it saves
lots of time to have a flash drive with Qubes itself installed on it
(not the installer, but an installed system) to be able to check
hardware support before they touch their disk. Make that install
without sys-usb (and no rd.qubes.hide_all_usb boot arg). Also, you
should be aware of this outstanding bug [1], to avoid potential data
loss.
Another suggestion: when I presented about Qubes at a local conference
I set up a laptop with no personal data whatsoever which served to
showcase the abilities of Qubes and which I was happy to pass around
to whoever wanted to try it out themselves, without worrying at all
about what they might do to/with it. This first-hand experience alone
was enough to convince several hesitant people to make the jump, and
they are now running Qubes themselves. That laptop also had a windows
7 VM with the Qubes windows tools installed, and that had some "wow
factor" for several people.
Cheers,
Jean-Philippe
[1]:
https://github.com/QubesOS/qubes-issues/issues/2835