SFC relay with bonding and smoothing

I’m considering adding a SFC Relay at home to route traffic from my Transit Max Pro router in our RV, but I’m unsure how relaying traffic this way would affect the current SFC routing I have set up with dedicated SSIDs and vLANs to allow me to bond or use smoothing / FEC across connections as needed.

Would I have to choose between something like Smoothing and using the relay at home, or would the smoothed or bonded connections still route through the SFC Relay? Thanks!

Does one need to use the Speedfusion Connect service for this device to work? What about those of use that have indepedent Fusionhubs setup?