I think you should try it. Just be sure you have the "basics" you need for an outdoor show: tent with sides, weights, tables, displays for your jewelry, bags, business cards, etc.
You don't need giveaways. Trust in your handcrafted jewelry.
You don't need a banner. I got one and decided it was a waste of money.
You probably won't need custom order forms. People at craft shows generally want instant gratification and very few will place an order for future delivery. I used to sell personalized stuff and found that very few ordered. And, when someone did, it took a lot of time to fill out the order form, explain their options, etc. I probably lost paying customers because I was busy with a custom order. Have paper and pen with you in case someone really is interested in placing an order.
You'll learn WAY more about what you really need at show by participating in one.
Don't let being in Pennsylvania stop you. October is a beautiful time of year here. I've lived in PA all my life (originally from Emmaus) and, in fact, lived in Center Valley while my daughters were growing up (they both went to Southern Lehigh High School). I'm now in Bloomsburg, but I get down there often as both my daughters are still down there (one has just started building a house in Coopersburg).
I run a Facebook Group: PA Craft Shows. You might want to join the group. It's a great way to find shows in Pennsylvania.
https://www.facebook.com/groups/PACraftShows/Best of luck to you in whatever you decide to do!