Kourtney Kardashian & Scott Disick: **** It, We're in Nantucket!!!

Kourtney Kardashian's got her brood a crazy Nantucket estate for July ... and Scott's there too!

Kourtney's rented out a 7 bedroom, 8 bath Cape Cod pad, and it's pretty spectacular. The pics were enticing enough for Scott to ask if he could tag along, and Kourt obliged.

The house goes for $6,600 a night, but we're told Airbnb hooked Kourtney up.

East Coast, beware ... you've been invaded.