I'm excited! I have been to Wellfleet only a handful of times (rail trail, riding through on the way to PTown), never enough to explore, but I just booked a weekend in August at the Wellfleet Hollow Campground which is apparently a new tent-only state-owned campground (woohoo, this opens up a good option for a bikepacking tour to PTown - only 20 miles away or so for a lazy last day plus mileage from ferry).
Definitely bringing bikes, going to explore some of these spots with my daughter. Apparently the CCRT has been extended right to the campground! Post up some more of your secrets!