Back Button support without using max-execution-snapshots

[avalanche333]

Hi all. I'm looking to add back button support to my flows without using max-execution-snapshots.

Here is my scenario.
1) An external source posts some params to the first page of my flow.
2) I evaluate the data and either show or hide some fields on the page.
3) User clicks next button to go to next page of the flow.
4) User clicks back button.... at this point I no longer have the param that was posted to me.. and if I try and store the data in HttpSession it gets cleared out when I arrive back to Page 1.

I want to avoid using max-execution-snapshots.

Thanks,

[avalanche333]

Nevermind... I found the session was being cleared in my code.