We had a 3 days trip to Jodhpur in February, first we went to Osian which is 70kms away from Jaipur. If you want to take a feel of Sand dunes then this is definitely a must visit place, We stayed at Osian Desert camp resort, the hospitality was so good and the camps were so neat and clean. We also had camel ride and kalbeliya dance arranged by the resort people. Next day we reached Jodhpur and its truly a blue heaven, I visited Mehrangarh fort, Umaid Bhavan palace, Jasvant Thada, Ghanta Ghar and Step well. You can find the blue Houses at a particular area which is known as Brahmpuri, its all blue over there. One should definitely visit the blue streets, you will go mad with Colours and cultures of Jodhpur.