Hi Nicole,
You probably want to create one program that has in it a landing page, email invitations, form, etc...
Then you want to create Tokens in the program in the My Tokens tab for that program. Then you want to create tokens for the various parts of your roadshow that will change (times/dates/locations).
Then you can clone your program fo rhte 2nd of your series, and just change the tokens, and everything will be just like the first, but with the information for the 2nd series.
Rince and repeat for third.
Hope that makes sense!
Sam