A good question.
A local answer.

Ask when the hold is released and whether insurance choices change it; a quoted rental rate is not the whole cash-flow need.

If seeing kangaroos is the priority, compare a managed wildlife visit with a speculative dawn drive.

Confirm two separate bedrooms and the full bed setup for the actual unit offered.

Add an evening walk only if the group still has energy; save distant sights for a full day.

Map the first coastal stop and daylight before choosing a pickup location merely for convenience.

Keep the final day movable if coast weather changes the order.

Keep the car's height, rental return fuel and the walk to your hotel in the plan.

Book directly if it offers clearer support, or use an agency only when its terms suit you.

Put the fixed train and farm bookings on a calendar first, then group nearby city and nature outings around them.

Check recent service and noise comments for the specific dining room and book if the evening is important.

Use a tour or designated driver if everyone wants to drink; add the transport cost before comparing venues.

Check seasonal access, fire or weather alerts for each park close to travel and keep one flexible day.