A good question.
A local answer.

Use Transport Canberra's current journey planner for the Botanic Gardens and Arboretum. Old tourist-loop bus numbers in forum posts may no longer apply.

Choose one accessible museum or gallery per outing and confirm the current entrance, lift and seating information with the venue. The distance from parking or drop-off matters.

Group nearby institutions into one day and use current Transport Canberra routes for longer hops. A car-free visit works better with a central base.

List your must-see places and compare their door-to-door journeys with current bus timetables. Central sights can work without a car, while distant nature stops may not.

If making several trips, look at the current daily fare cap and remember to use the same payment method for each trip. Mixing cards may prevent the cap from applying as expected.

Plan the actual route from Kingston station; the rail terminal is not the main city bus interchange. Check the stop and walking distance with luggage.

Check current VisitCanberra bike-hire listings and confirm price, opening hours and availability directly. An older lakeside rental recommendation may no longer operate.

For airport day, ask the hotel to estimate a car pickup time and compare that with the bus journey including luggage. Do not base the plan on a hotel name alone; confirm the address.

Agree on a drop-off at the summit and choose your walking finish before you set out. The return to your accommodation may require another bus or car trip from the trailhead.

A MyWay+ card or QR ticket is another option, but compare the current visitor guidance before buying one. Keep one payment method per passenger and check any concession eligibility separately.

If an aid would help, the Gardens say visitors can book a wheelchair or electric mobility scooter without charge, subject to availability. Contact the Visitor Centre ahead of time to confirm what suits your needs.