Craig,
Let's try this method then:
1. Upload your tile package to ArcGIS Online My Content (uncheck the option to publish)
2. Copy the URL (For example: http://ess.maps.arcgis.com/home/item.html?id=ec54ab5ca97a441d9482292694989101 )
3. Open the .info file and delete everything and paste your code here. Make sure that you add the URL of your own tile package here. The code should look like this:
4. Save the file and publish your service.
5. On the iPad, downlaod your survey, and open it.
6. Click the menu and Download Maps
7. You will see your tile package listed here for download.
8 When you click Collect, the map will be loaded for you.
9. Just for your reference. After you publish the survey, the info file will look like this. The second URL is the feature service.
Fasil
Esri Support