I have to confess I went anyway, just trying to kill some time. I don't go to a lot of the shows so some of the things were first few for me; like the oil extractor?
Never really got into it, but essential oils and hydrosol (fragrant water by-product) seem to be desired among preppers, especially soap people and candle makers. I guess there could be medicinal uses, but again, haven't seen the value yet.