I’ve got the basic strapping/dressing/cleaning stuff but with a tick twister and a decent sized squeezy ampule of saline to irrigate a muddy/gritty wound.

For self amalgamating bandage, see ‘Vet wrap’ – it’s used a load by vets for dog/horse leg bandaging and it’s pretty cheap – and works a little like duct tape, so you might even be able to bodge a bike repair with it… 🙂