Multiple Steps WITHIN a Multi-Step Accordion Form

I'm designing a multi-step accordion form flow for a package shipping process. The users fill out their "to" and "from" information easily in separate accordion sections, but the third section contains multiple steps within it for the user to fill out.

Does anyone have ideas on how to display this elegantly? Making it one long scrolling section is an option, but it might be too much scrolling for some users' tastes.