How to capture email asset ID, campaign name, and campaign ID in an Eloqua form?

I have a normal demo request Eloqua form that I’d like to use for tracking demo requests. I would like to update it with new fields to help with reporting and analysis. Specifically, I want to capture:

• The email asset ID
• The email name
• The campaign name
• The campaign ID

My questions:

1. Is there a way to automatically pass these values into hidden fields on the form?
2. Do I need to create new Field Merges for these values in order to store them?
3. If yes, could someone break down the steps for creating these field merges and configuring the form so I can capture the data?