Headset for iPad voice control and iPhone calls at same time

I want to connect a headset (both speakers and microphone) to my iPad for voice control but still allow the iPad to be connected via Bluetooth to my sound system to play music via the system speakers without music coming through the headset. I also want the headset to be able to connect to my iPhone for phone calls where the iPhone sound does come across the headset and I can use the microphone to speak during the phone call. All of this is occurring on my motorcycle where the iPad is using the iPhone as a Hot Spot. Is this even possible? If I can't have everything, can I still have the headset for either just phone conversations or just iPad voice control?