Friday is when popular makers sell out. People looking for specific things buy on Friday at full price. Selection is best, but prices are high. The most popular makers will sell out within an hour or two on Friday.
Sunday is bargain day when the bargain hunters pick through what remains and many dealers and makers are quick to drop prices. But, selection is poor on Sunday.
Saturday is this sort of interesting malise, the duldrums of the show. Saturday is the day for looking, looking at knives you're not specifically interested in for yourself but interested in for general interest, looking at fancy custom knives you can't aford but enjoy gawking at anyway, looking at what the manufacturers are exhibitting, looking at custom makers you're not acquainted with, and looking at what all your friends bought on Friday. Saturday is the day for commissioning custom works from makers (they're busy selling from their tables on Friday and Sunday). And Saturday is the day to have long conversations with your friends.
Cash is always king at this sort of thing. Nobody's gonna say, "Oh, sorry, no. I don't take cash." But most dealers and many custom makers take plastic. A remarkable number will take personal checks. One well-known custom maker who's been in the business for about twenty years told me last year, "I've never lost a dime on a bad check. Knife people are honest people." I hope it stays that way.