Complex sentence: Most visitors arrived via the Gulf of Aden and the Red Sea and many of them camped at Jaldessa for at least a day before traveling further to Addis Abeba, Harar or other parts of the country.
Split into simpler sentences: Most visitors arrived via the Gulf of Aden and the Red Sea. Many camped at Jaldessa for at least a day before traveling further to Addis Abeba, Harar or other parts of the country.