Bluetooth Music from Phone to Spyder speakers

[Easy Rider]

I don't like my speakers blaring for everyone to hear,

On an RT with a headset, you can turn the speakers OFF. Easy.

On the original question: Do you have a GPS ??
You can transfer your tunes to a micro-SD card and play them from the GPS through the audio system.

I haven't done that enough to know how much control you have though.

And this might be an even better idea:

For a 2016, you do not need an ipod in the trunk. Just put your music on an inexpensive thumb drive and plug it in and leave it there. All will be available on the screen with full playback controls.