Both DH and I have rear racks on our hybrids and panniers on both bikes alongwith a front bag. We also purchased a used baby trailer. We looked at several bike trailers and the baby trailer is designed to haul 100 lbs and was less expensive. Of course we are not dealing with a hill either. Good plan to haul the extra heavy stuff in the car and pick up lighter stuff with your bike. We do that. Since we are used to hauling extra water in our panniers for our rides, we do not notice much difference when we are bringing other things. The key for us is to stay stocked up on our canned goods and heavier items - that way we do not have to haul so much at one time. We can easily take our weekly grocery items in the panniers and the top of the rear rack can take a small cooler for perishable stuff like yogurt and milk. We also have backpacks that hold quite a bit as well. Post a pic when you get your bike set up. We are always looking for new ideas, but so far our panniers have been wonderful additions to our bikes.