You need to have the text fields in the table applied: Hidden until Triggered
Then you need to have an action for the Yes Checkbox to Show/Hide Buttons and Forms. You will need to select the visibility (eye icon) of every form field. Unfortunately there is no way to group all of the fields and have just one visibility on/off for the grouping.
I did as you said and have got the table background showing up once the relevant radio button clicked. I set all the individual form fields within the table to 'hidden' also and then added a visibility change to each of these on the click action. However I just have the table background appearing at the moment (not the form fields). Any ideas where I might be going wrong? I checked the form fields (all text boxes) have been brought to the front.
Have just found the answer to this. Looks like it is really important in what order the elements appear, in that Actions window. Previously the individual text fields appeared before the table background in the visibility list. Once I moved them below the table background button, they appear fine when actioned.