How do I track in person events in HubSpot, like conferences?

Hi, 

 

I am trying to capture the data on how many events our teams are attending externally. So I create a full understanding of engagement. So I know what the ROI is from attending these events and knowing how many events have we been invited to based on our memberships, and what type of event they are.  

 

I will take any suggestions. 

I have looked at the custom objects and creating a pipeline but if their is a way that someone else has captured this data. I appreciate your help. 

 

Thank you