Fall is tough on the Cape, even before the southway closed. Most people fish with a car on the sound side or 4x4 and permits on the bay side or Nauset beaches.
The bass are where the bait are - you're chasing blitzes effectively from beach to beach or parking lot to parking lot. People look for birds.
Alternatively you can fish the sound side jetties on the upper cape for big blues and Albies but you need to know your spots and keep an ear out for local intel.
IMHO rhode island or even montauk are better bets now. RI spots like watch hill, napateague and south county beaches will put you on more consistent action.
The spring fishing from mid May onwards is a lot more consistent on the Cape than fall. The bay side beaches and creeks will produce bass daily on the fly up to 35" of more. Many times sightfished right on the beach.
Fishing the falling tides are safest, pick moon tides and overcast days for best results.
Any eyed sandeel pattern will do - olive over white, root beer over grey or lavender over grey, yak hair, fishair or flatwings, fished on an intermediate line .
I just moved to pa after 8 years of flyfishing the Cape, if anyone wants to PM me for info, Please do.