Unfortunately, no. At least not with workdocs… not yet. Workdocs are very new. I fully expect that there will be API and/or automation access to workdocs eventually. Hopefully, soon.
I think that your best bet in the short term is to use an automation to create an update when the item is created to hold all of the data that you want. You could then use it as is or copy it manually to a workdoc, or a long text column.
I am working on making the copy of update data to a column automatically, possible. But that could be as much as a month away.
If I am understanding your workflow correctly, you could move your form to a seperate board then create the update and move the item to your current board with an automation. Then you could remove the additional columns from the current board.