D12 full party mounts

Building out from some ideas in response to a reddit question on what would be awesome mounts for a party.

All of these are therefore 'full party mounts' - big enough that everyone can ride along on top.
1. A dinosaur mount, a small-to-medium sauropod; the bones are fossils and it is an animated object. Sitting on its vertebrae is a comfortable ride.
2. A dinosaur mount; the bones forming the structural supports for a construct; a museum piece repurposed as a masterwork by an artificer guildsman. Consumes any dry organic matter thrown into the brass stove in its chest. Do not let your feet dangle within its form or they will get tangled in wires or worse.
3. A raised-dead skeleton from actual ceratops dinosaur bones, no doubt fished out of a tar pit. Sticky and now coated in dust, leaves and debris. Someone strapped the most disreputable wagon you have ever seen on top at some point.
4. A pile of trees and junk that is being poltergeist-ed by a dinosaur-spirit in a dinosaur like fashion. If 'killed' the component junk collapses to the ground. It will reform from suitable materials next dusk. Riding it is like being on an animated hillock.
5. An animated coal-seam; the crushed remains of aeons of dinosaurs returned. Everything it carries smell like a coal cellar afterwards. It leaves a trail of coal dust and is flammable if kept in prolonged contact with flame.
6. An actual live dinosaur. It has beautiful leatherwork reins, capacious saddle bags and a series-saddle to seat six.
7. A giant crocodile. They have terrible side-to-side motion as they walk but are excellent aquatic mounts. It is recommended to dismount and lead them once you get to the shore.
8. A classic fantasy world floating rock with a hut on it that is towed around by flock of geese. The geese are tethered to the rock with very long ribbons attached to collars. All the decor in the hut suggests a recent resident of impecable taste but reduced circumstances.
9. A giant hamster with a passenger pod permanently held in one of its cheeks; getting in and out can be tricky. The design of the passenger pod suggests gnomish work.
10. A very very large wombat, within whose pouch the party can ride. There are no amenities.
11. A cute aye-aye, ex wizards familiar gone independent, that has the ability to pull together a 'riding form' out of dust and junk from its surrounds. It happily conveys the party about in exchange for being able to sleep in someones pocket when it wants to.
12. A floating howdah; it responds as if it is mounted upon an elephant but there is no elephant. The woodwork is exquisite.

Taking a lesson from 'just use bears' - all of these use the elephant stat block wherever relevant.