Choose the direction and the main interest
A Limestone Coast road trip can link Adelaide and Victoria or form a return journey from Adelaide. Decide which you are doing before booking the first night. A through-route can reduce backtracking, while a loop needs a realistic plan for the return.
The region combines coast, caves, wine country and Mount Gambier's volcanic landscape. Pick two or three of these as the main themes. Trying to give equal attention to every theme in a short break leads to late arrivals and little time outside the car.
A five-night through-route to compare
For a trip continuing toward Victoria, consider two nights on the coast around Robe, one night positioned for Naracoorte or Penola, and two nights in Mount Gambier. This creates a complete coastal day and a complete Mount Gambier day, while the cave or wine-country stage gives the inland section a clear purpose. It is an example to test against your dates, not a timetable to follow regardless of bookings.
If caves are the priority, choose the intermediate bed around the tour time and put less into the coastal transfer. If wine is more important, a Penola or Coonawarra-area stay may serve the evening better, with tasting transport arranged. Travellers interested mainly in the sea can stay longer around Robe and reduce the inland section instead.
For a return to Adelaide, do not simply attach the whole return drive to the final Mount Gambier afternoon. Allocate a transfer day and decide whether an inland stop makes it more comfortable. The route's attraction is its contrast between shore, underground landscapes and crater country; it does not require a new accommodation every evening to achieve that contrast.
Use a coastal town for more than a lunch stop
Robe can make a useful coastal base when you want an evening and morning by the sea. Check the accommodation's distance from food and the particular beach or walk you have in mind. A property labelled coastal may still involve a drive for everyday needs.
Allow a full local day if a relaxed beach break is part of the purpose. Otherwise, an overnight with a short walk may be enough. Read current beach notices and let conditions determine whether the outing centres on sand, a headland or town streets.
Give caves a reserved block
Naracoorte Caves offers a different kind of experience from a coastal walk. Choose the tour by its content and access requirements, and reserve when needed. Underground visits can involve steps and enclosed spaces, so check the description for the actual tour rather than treating all caves as equivalent.
Build the day's drive around that booking. Arriving just as the tour begins removes time for parking, check-in and toilets. Keep lunch and the next stop flexible so a longer visit does not create a rushed onward journey.
Stay long enough in Mount Gambier
Two nights in Mount Gambier give time to separate Blue Lake/Warwar and other geological sights from the surrounding town. Do not confuse the Blue Lake with other nearby waterholes; access and permitted activities differ. Follow the information at each site.
Umpherston Sinkhole and a town meal can occupy a different part of the day from a wider regional outing. This is more rewarding than treating the city as a bed between Adelaide and the Great Ocean Road. Check the daylight available before adding coastal detours on arrival.
Add wine country only when it fits
If Coonawarra is important, set aside time and organise tasting transport rather than inserting several cellar doors into a long driving day. A non-drinking driver or a suitable tour changes what is possible. Reserve specific experiences and meals when required.
Travellers with little interest in wine can use that time for a longer coastal stay or another cave experience. The route does not need every recognised regional name to be complete. It needs a sensible sequence of places you want to spend time.
Protect the final transfer
The last day may involve a long journey toward Adelaide or into Victoria. Avoid booking a late activity far from the onward route. Fuel, food and the return of a rental car require time separate from sightseeing.
Keep a weather alternative for each outdoor day and save current road information before departure. A strong itinerary leaves enough room for an unexpected enjoyable stop without making the next hotel difficult to reach. Plan nights around usable days, and the Limestone Coast becomes a holiday rather than a series of distances.
