Helped run a local chapter of NWTF and I have sat on the state board. A few things that people always commented they liked were as follows.
1. A packet/brochure either with the invite, or a couple weeks ahead of the banquet showing the main prizes. Doesn't have to be all of the prizes but most.
2. Off site bidding, last few years we have had off site bidding for a few items, it comes with a fee but we have seen it add to our revenue.
3. Split the pot kids auction. Depending on the size of your banquet you trim the ages to make it fit to where you have 12 to 24 kids. Have a small give away for those that don't get to participate (hat, magazine subscription, something to hold their interest). If you have 12 keep them separate, if you have 24 pair them up. Split siblings where possible! Number them off write it in two pieces of paper. Then auction the kids(their number) to the highest bidder! Winning bidder gets the number from those kids each time. Once bidding is over, put second set of numbers in a hat and draw. Winning kid/kids get a cheap gun or a lifetime hunt permit bidder that won those kids gets half the proceeds from the bidding. Is normally a great money maker.
4. Activity specific items. Wild turkey federation banquets every year I put a package together with a nice decoy, decent shotgun, some calls, and a vest. . . Always made money on that raffle. For mule deer it could be an optics bundle, lightweight camp setup, whatever just a nice setup that guys would want.
5. Have women's hunting gear but have some non hunting stuff too. Every year we get a piece or two of jewelry from a local jeweler for our silent auction, they always go well for the non hunting wives.
6. Meat processing stuff - last few years these have gone over well as well - grinders, sausage stuffers, or gift cards to local processors.
biggest advice is this, make sure your price of admission is making some money after food costs! To many banquets lose $3-$5 a plate and it kills earnings! Provided an alcohol option, it's great if you get a cut, but we have done venues where they get all the booze money - in exchange we ask for free or reduced venue rental! But you want a good time for all.
And make sure you educate on the organization, it's goals, and what it's doing locally. We always have a paper at every seat showing dollars spent in the state, and dollars spent within a 50 mile radius typically going back up to 5 years. Most people are shocked to know we paid for some things