Hey, thanks for the tag @samyak. In addition to the great inputs here, you should always think of ways for people to physically interact with your brand in a way. Most sponsors at the event will be doing videos, presentations, flyers, and what not. I spoke to a field marketer recently and they shared how even gifting a fancy water bottle could be a game changer. Think about it.. that's one of the easiest ways to stand out and show up in their daily lives as opposed to fighting for views when you're only focused on marketing your product.
Other than that, anything creative (guerilla marketing techniques and brand activation) comes to mind.
And remember, if you or your team is at the event to generate leads and have sales conversations, it's always better to have deep conversations with 10 people than superficial ones with a 100.
Hope this helps!