Currently, I own two bikes, a nice road bike that I take on charity rides and the like, which is more for speed and fitness. I also own an old Trek 1000 (downtube shifters and everything) that I wouldn't mind putting a rack on. I live about 3 miles from the grocery store. I own two square open top, removable panniers for the rack. So, I've been considering using my bike, or something new, for grocery shopping. I'm going to try it today, to see if the panniers are enough. I have a feeling that they won't be for my typical hauls. So, I have been kicking around a couple options. I could either increase the frequency in which I visit the grocery store, given the limited pannier space. Or, get a trailer of some sort. I don't plan on living in the middle of no where forever. I belong in a city. So, I would like to know if a cargo trailer, either the one or two wheeled variety, is going to work in a city setting, as well. Thanks in advance for any wisdom.