If you are looking for something small just for pilots and friends to hang out. Just have a Ice Cream fly-in. We have done this for a few years (once to twice a year) and it pulls about 20-25 aircraft in one day. We have a farm in the mid-west...so it is enough aircraft for us to handle. We have done everything by donations, it covers the cost of the food, drinks, cups, bowls and other helpful things and some left over for gas money to mow the runway. Once the word gets out...you might have all kinds of aircraft dropping in for food. But that is what makes it so much fun!!!
We have done a few things on different foods like smoked pork chops, walking tacos, chicken wings and the pancake fly in. The most favorite has been the Ice Cream fly ins..(chicken wings are the next best). Keep it very simple for your first time and grow it if you want. Ice Cream is cheap and easy.
Word to the wise, people who are not around aircraft (general public or just friends) and they have kids...the kids get very excited and will run towards noise

like a starting engine. Thank God for a father who tackled thier child, it was not a good scene to watch play out by what
could have happened. (And shame on the father who was not watching

....)
I don't mean to be a downer...but please look at the what ifs and understand the risks and how to manage those possibilites and risks. That is why I like staying small and focus owner/pilots.