Matt-
I am currently working on a similar project. You must separate your report into odd and even pages. I designed my report to contain the primary data on the Odd pages and the return address on the even pages. For example, create a Group Header 1A and 1B. In the Section expert, click the NewPageAfter checkbox and enter the following formula:
GroupHeader 1A
Not OnFirstRecord and Remainder(PageNumber,2)= 0
This will force a new page when page number is even.
GroupHeader 1B
This group contains and displays the address fields.
No conditional formatting.
This might somewhat simplistic but, the general idea can be applied according to the complexity of your report.