I'm writing an article for the site about my experiences at the fests from the summer (mayhem, summer slaugher, and TIHC) but this was by far the best of the 3 and Mayhem is definitely a "bigger" fest. I'm sure the promoters already have a laundry list of things they found went wrong but from a spector's point of view this was pretty insane. The only thing I could see in terms of improvements or making it bigger would be move it to a field and offer campsites. Turn it into something that mirrors one of the fests in Europe. Everyone has been looking for a new Hellfest since that ended and I think this years TIHC has officially reached that status.
As for bands, my personal highlights were Ringworm, Earth Crisis, Harm's Way, Death Threat, 100 Demons, Will To Live, Nails, and Crown Of Thornz.