I think a problem you'll have, as you may even already be encountering, is that with a motorized bicycle you'll be neither fish nor fowl, that is, neither bicycle nor motorcycle. There is no community of hybrid motorized bicycle tourers for you to turn to for advice prior to departing, nor succor once underway. In the likely event your contraption ends up disabled and on the side of the road, cyclists will see the motor and ride on by without an inquiry such as "You good?".
If you ditch the motor, attach a trailer to that Schwinn tourer what you've got, then you are in business as a tourer. You'll lose the power from the motor, but you'll gain a community.