Do you mean something like this? I also like my bike too much to motorize it and add racks in any way shape or form to be able to carry loads easily. I made this up using a BOB Ibex trailer and a Golden Motors Magic Pie motor that I run at 48v/1000w which gets it up to 20 mph on the flat with a tail wind under motor with some active pedaling in high enough gear to sync with it. The orange ammo box holds the 12ah LiFePo4 battery and charger nicely and the deals only cooler filled in the rest of the deck nicely. I live where it rains though so I need to make up some kind of a condom to keep the cooler dry but the battery box is watertight.

I did 70 miles with it today against some pretty fierce headwinds at times. I went to visit a friend that lives 35 miles away, recharged while visiting but only took less than 2 hrs to replace the 7ah I used to get over there. But I did draft him on a long headwind stretch as he was on a gas bike and had more speed but he tapered back to 18 mph and held it there and it for sure saved on battery as I used 9ah on the way home but there was more headwind and hill climbing going that way also.