Dinka Enduro and the safehouse vehicles
A trail motorcycle and a kayak waiting at Jason's safehouse. The kayak is the interesting one.
The Ultimate Edition puts a Dinka Enduro motorcycle and a Crest Kayak at Jason's safehouse, alongside the Vapid Ganado.
The Enduro
A green trail bike with knobbly tyres, high-mounted exhaust and long-travel suspension. Dinka is Rockstar's Japanese manufacturer, broadly a Honda analogue, and an enduro is the bike you take where roads stop being roads.
In a state with wetland tracks, national park trails and the back country around Ambrosia, that is a genuinely useful thing to own rather than a styling choice. It is also small enough to matter under the new weapon storage rules: a bike carries far less than a car, so taking it is a decision about what you can bring.
The kayak is the notable one
A Crest Kayak is not a getaway vehicle. It is a leisure object, and its presence in a paid edition tells you Rockstar expects people to spend time on the water for its own sake.
That lines up with everything else shown: kayaking and scuba diving both appear in the Extended Look, the Keys screenshots include a full reef with a turtle and a diver, and Mount Kalaga has a river with somebody paddling it.
Red Dead Redemption 2 spent a great deal of effort on activities with no criminal purpose whatsoever, and it is the main reason people describe living in that world rather than playing it. A kayak in the launch edition suggests the same intent here.
What is not known
Rockstar has not said whether the Enduro or the kayak exist outside the Ultimate Edition, and has published no handling detail for either.