Yes that is true for the cabins. You can get (or in the past have been) offered bounce-back there. And just because they offer them for the cabins don't think that they do/may/might offer them for the campsites also. It doesn't work that way.
Technically in the computer system, the resort called "The Cabins at Disney's Fort Wilderness Resort" is completely separate from the resort called "The Campsites at Disney's Fort Wilderness Resort". The cabins are technically no different than Port Orleans or Coronado Springs or Caribbean Beach. Here's an example:
In the reservation early check-in for the campsites, I think you still can (or used to be able to) specify a friend/neighbor you wanted to camp nearby (or them you). In the past it was a
manual request to manage on the individual reservations. Now it's an
automated request since both campsites are at the same resort. But some folks, on occasion, have some friends/family in a cabin and themselves in a campsite and want to be as close as possible to each other. I believe that STILL can't be automated - it's a manual process only. You might as well be asking the computer for a campsite closest to Port Orleans.
@morrik5, if your DD stays at the cabins, she has the benefit of more frequent general public discounts available on those. Nearly every discount offer that applies to most resorts includes the Cabins. And hey, I don't know if
DCL had dropped some prices recently to fill the boats but if so, Disney will sprinkle some pixie dust on those low rates

now or sooner (!) to get those rates back up to higher levels. I'm not a cruiser so I am more clueless than normal.

But that's why I told
@Paulaparm to grit her teeth and be prepared to pay rack rate for campsites. It is what it is.
Bama Ed
PS - also the Cabins are generally included in Florida Resident discounts and other types that aren't available on the campsites. Back when my DD was in the Disney College Program, she got me a Cast Member discount on a FW campsite (40% off). She had to camp with us (technically be with us at check-in to show her WDW ID to get the discount applied) which was great but all that was available was a TENT site. Which is fine for my popup but I was ready to save 40% on a Premium site!

(that was before the Premium Meadow category came along).