Hello! That sounds like an exciting trip. Here are some travel tips for your visit to Cape Town, Hermanus, and Johannesburg in South Africa.

Best Time to Visit:
The best time to visit these locations is during their summer months, from November to March, when the weather is warm and dry. Cape Town is particularly beautiful during this time, with lots of sun and long daylight hours. For whale watching in Hermanus, the best time is from June to November.

Route and Accessibility:
All three locations are well-connected by road and air. You can fly into Cape Town International Airport or O.R. Tambo International Airport in Johannesburg, both are international gateways. From Cape Town, you can drive or take a bus to Hermanus which is around 120 km away.

Accommodation and Booking:
All three cities have a range of accommodation options available, from luxury hotels to budget guest houses. It is advisable to book in advance, especially during the high season. Websites like Booking.com or Airbnb can be used for reservations.

Clothing and Essentials:
Since you'll be traveling during the summer months, lightweight, breathable clothing is recommended. Don't forget a hat, sunglasses, and sunscreen for protection from the sun. You might also want to bring a jacket for cooler evenings and an umbrella in case of sudden showers.

Health and Safety:
South Africa is generally safe for tourists but it's always advisable to remain vigilant about your possessions and where you're going. Avoid isolated areas at night. Check with your doctor about any recommended vaccinations for South Africa before your trip.

Local Etiquette and Respect:
South Africans appreciate politeness and a friendly approach. It's important to respect local customs and traditions. As a diverse country, it's appreciated if tourists demonstrate understanding and respect for its various cultures and historical issues.