I agree with Jc_selector: that zoomq3hd picked up cheap from ebay works like a charm.
works very good as field-recorder… nice and portable. has line-in and line-out.
(so you could put it between your octatrack and mixer… record your gigs…)
and gives nice video-files to work with… I just drop the recording results straight into reaper… I would use that ipad as touchcontroller/synthie thing… much better use for it, then crappy video-recorder… (hard to aim at something usefull and all that)