Hi @Sara -can I ask 2 clarifying question about how you use the data...
1) what's your goal for lead capturing? e.g. do you need it to track movement at an all day event or purely to capture 1 time attendance (e.g. entry)
2) what's the goal for uploading to salesforce? Do you use it to track who attended/did not show? or something more sophisticated like follow up marketing campaigns
I use a few different suppliers so might have some recommendations depending on how you use the data.