Custom activity attribute as token?

Hello Everybody,

I have a question I'd really appreciate your help with.

So i've created a custom activity (let's call it "shop visit") with a bunch of attributes ("visit datestamp", "visit status", etc).

I'm wondering if there's a way I can go beyond using those to trigger a campaign but to use them as tokens to populate an email I'd be sending to a lead, something like:

Hi,
You successfully visited us at {{trigger.visit datestamp}} and your visit was {{trigger.visit status}}

As far as I know there's no way to use custom activities as token to update email copy, but maybe there's a way I can transfer the custom activity attribute values to custom fields in Marketo? Maybe some formula? I don't see a way to do that using email scripting either. And I can't think of a way to do that right now and I'd hate having to populate custom fields via API as it ruins the elegance of the whole solution.

All help would be highly appreciated.

Cheers,
Paul