What is a good three-day itinerary for travel fell romantic Cape Cod?

I'm taking my girlfriend on a surprise trip to the end of September Cape Cod and looks like a great destination. We're flying in Providence RI on Thursday night, and the need to be back on Sunday night for our flight Providence home. I'd be in two places. Provincetown looks good for a visit, so I would definitely like to spend some time there. I would also like do some outdoor activities (biking / dune / whale / fog / unusual) as well. Looking online, it seems that there is much do is a little overwhelming. Does anyone have any suggestions as to what really can fit into three days without being too hasty? (We rent a car aa)

In fact, I would not stay in two places differtn If I were you, a weekend is not long enough to be worthwhile – better than besdies layer has to offer can be find around P-Town (Provincetown) .. Whale watches leave right from the docks of P-Town, the nightlife is the best in P-Town (just do not be afraid of gays are Harml; ess and friendly), there are many beaches a short bike – points race on the beach, herring cove, there sa great bike path that winds through the dunes P-Town to get to Race Point North Beach Visitor Station, P-town is also known for hip, trendy shops and good restaurants – go to the bakery in Portuguese absolutely amazing!