Maybe not completely what are you trying to accomplish but you could try architecture described here
http://kirkbushell.me/laravel-4-an-alternative-application-workflow/
http://kirkbushell.me/laravel-4-an-alternative-application-workflow-part-2/
TL;DR:
Create one (workbench) package for "admin"
Create second package for "public" part of site
OR
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