Just wanted to post an update for everyone. With the newest Debian 10 update, any USB device which is plugged into the system is immediately recognized with an appropriate icon placed on the desktop, unmounted. That's nice. It makes it extra nice because any device can be removed without having to eject or unmount it.
The Shotwell program does not automatically start up when the camera is plugged in, but that is likely a problem with specific actions not being associated with the plugin. Probably a Xfce issue.
Thanks to all.