Hello! That's an excellent choice. South Korea, with cities like Seoul, Busan, and Incheon, has plenty to offer, including rich history, vibrant culture, and stunning landscapes.

Best Time to Visit:
The most ideal time to visit South Korea, especially cities like Seoul, Busan, and Incheon, is during the spring (April - June) and autumn (September - November) seasons, when the weather is mild and nature exhibits stunning blooms and foliage respectively.

Route and Accessibility:
Most international travelers arrive in Seoul at Incheon International Airport. From Seoul, you can easily reach Busan by bullet train (KTX) in approximately 2.5 hours or by bus in about 4 hours. Incheon is just an hour away from Seoul by train or bus.

Accommodation and Booking:
South Korea has a vast range of accommodations. It's advisable to book in advance, particularly during peak season. You can choose from five-star hotels, budget hotels, guesthouses, and the traditional Hanok stays. Airbnb options are also available in these cities.

Clothing and Essentials:
Layered clothing is advisable due to the varied weather conditions. Carry rain gear for unpredictable downpours. Comfortable shoes are a must as you will be doing a lot of walking. Don't forget your power converters for electronic devices and travel adapters for Korea’s type C and type F outlets.

Health and Safety:
South Korea has excellent healthcare facilities. However, ensure you have comprehensive travel insurance that covers medical expenses. Adhere to any travel advisories provided by your home country. Basic precautions like keeping personal items safe and maintaining hygiene should be followed.

Local Etiquette and Respect:
South Koreans are generally polite and helpful. Giving and receiving things with both hands, bowing slightly, and avoiding pointing are common practices. Respect for the elderly is deeply ingrained in Korean society. Always follow temples' etiquette, like removing your shoes before entering.