Itinerary:
Day-1 (Friday, 18th Sept, start from Auh @ 3.00 a.m): Auh to Salalah(Oman) in one stretch via Mezayed(Al Ain) border post - Approx 1250 km (Reach Hotel by night)
Day-2 (Sat, 19th Sept): Salalah Local SightSeeing (Night stay at Salalah hotel )
Day-3 (Sun, 20th Sept): Salalah Local Sighseeing (Nightstay at the same hotel)
Day-4 (Mon, 21st Sept): Salalah Local Sighseeing (Nightstay at the same hotel)
Day-5 (Tue, 22nd Sept, start from Salalah @ 3.00 a.m): Salalah to Masirah Island - 850 Km , cross to Masirah in Ferry(Camping at Masirah)
Day-6 (Wed, 23rd Sept): Masirah Local Sighseeing (Nightstay at the same Camp)
Day-7 (Thu, 24th Sept): Masirah Local Sighseeing (Nightstay at the same Camp)
Day-8 (Fri, 25th Sept): Masirah to Abu Dhabi - Approx 800 km (Back to Abu Dhabi by night)
Total Road distance to be covered: Approx 3200 km
Total Number of days: 8
Total nights in hotel: 4
Total nights at Camp: 3
Here is the map and route marked on it
A nice writeup on Salalah Trip:
http://www.chirri2000.com/discovery/disc_salalah/disc_salalah.htm
About Masirah:
http://www.world66.com/asia/middleeast/oman/masirahisland
http://home.hetnet.nl/~lilian_jan_schreurs/oman/Masirah.htm
http://www.geocities.com/suonnoch/Oman/masirah.htm
http://exploremasirah.com/