We are currently using version 4.66 of the shopping cart on DNN version 5.6.3. 

We have a Dynamic Forms module that allows a user to sign up for an event that may require payment.  We would like to be able to send the user to the shopping cart with all of the appropriate information to pay for the event on line.  This way we could setup one product for "events" and differentiate them based on the description and date of the event.

We were thinking of using the custom field on a product details page but had some questions:

1. Can a user enter data into a custom field on a product details page? 
    An example might be to enter text to be printed or engraved on a product.
2. Can we go to a specific product details page using a query string parameter with the value to load into the products custom field value?
3. Can the products custom field value be included in reporting?

If this is not possible, can you suggest a way to handle this?