Thanks! I got it working - I had to add a FeatureLayer twice - one in selection mode with the popup template to handle the query and infoWindow contents, and a second time in ONDEMAND mode to simply show the data when one loads the map. Seems a bit unnecessary that I have to add the same layer twice to handle this functionality, but if that is the preferred way to do it then so be it!
Thank you so much for your help!
Jay