Hi @LauraH522,
Really good question! At this time there is not a way to save a campaign as a reusable template in Toolkit accounts. It is something we've heard feedback on, and we hope that it will be implemented soon. Unfortunately, I don't have a estimated timeframe, but we'll be sure to post in the Community if that feature becomes available. For the time being, copying an existing campaign is the best way to re-use the format on a future campaign.
Thanks for posting!