Mobile centric workflow best practices for large raw pictures

Dear community,

during my vacation I started a mobile centric workflow with Lightroom CC Mobile. Which now leads to sync issues in conflict with my account.

Thats why I'm asking for your expertise regarding best practices of a "mobile first" workflow.

What I'm doing:

- Importing the raw pictures from SD card to my iPad / Camera Roll with the SD-to-lightning adapter

- Importing the raw pictures from Camera Roll into Lightroom mobile

- Then starting a basic selection and editing in Lightroom mobile (Editing the raw pictures works surprisingly smooth and well on the iPad)

- Deletion of rejected images on the iPad

Now after my vacation I want to sync all that back to my desktop workflow (Lightroom Classic):

- I'm transferring the pictures to the Mac, adding them to the Lightroom Classic catalog

- Now smart previews for each photos are created and available

- however all edits are stuck on the iPad, and are not able to sync (a two weeks vacation shooting in raw easily exceeds the 20GB of my plan; however currently Adobe does not even give me a opportunity to upgrade the storage temporarily).

Now my two Questions:

- Is there a easy way to sync my edits from the iPad to the desktop without the necessity of synchronizing massive data amounts of raw data through the Adobe Cloud?

- Is there a possibility to replace the raw files on the iPad and sync back the edits to the desktop (remember: Now I have raw files with edits on my iPad; yet raw+smart previews without any edits on my desktop)

In case you have better ideas: Whats your best practices for a mobile centric workflow dealing with raw files straight from the camera?

Thanks a lot for your help, I'm really struggling to get my vacation photos back to the desktop!

Best Daniel