How to Say "Let's go to Jeju Island together in summer." in Korean?

"Let's go to Jeju Island together in summer." in Korean is 여름에 같이 제주도 가요. (yeoreume gachi jejudo gayo)

제주도 (jejudo) - Jeju Island
제주도 가 봤어요? (jejudo ga bwasseoyo) - Have you been to Jeju Island?
제주도 한 번 가 봤어요. (jejudo han beon ga bwasseoyo) - I've been to Jeju Island once.
제주도 다섯 번 가 봤어요. (jejudo daseot beon ga bwasseoyo) - I've been to Jeju Island five times.
제주도 귤 (jejudo gyul) - Jeju Tangerines
제주도 귤 유명해요. (jejudo gyul yumyeonghaeyo) - Jeju tangerines are famous.
귤 먹어 봤어요? (gyul meogeo bwasseoyo) - Have you tried tangerines?
어묵 먹어 봤어요? (eomuk meogeo bwasseoyo) - Have you tried eomuk (fish cakes)?