Either one is fine, depending on your circumstances. If your chassis battery gets too low to operate the awning, I think you ned to provide some chassis battery charging during extended stays. Many coaches do this automatically, but some do not charge the chassis batteries from shore power. A $25 trickle charger or something like the Trik-L-Start gadget would fix that.
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL