This is near to off season time, but still you can go by air to leh from their you can travel by road. but I choose to travel by road. You can travel from Delhi to Manali by Volvo bus, from Manali rent a bike or hire taxi if you are not a rider. at least you need 10days to complete Delhi to Ladhak trip
I had a recent visit on leh. I went for 8 days in last month of 2th Oct. It was asum experience and found best nature views. yes, You can visit anytime soon but now the winter is already started it will be difficult for the bikers to go there. The temp on day and night keeps fluctuating and snow fall can happen anytime this month of the year. If you planning to visit places like siachen base camp, Kumar post, 0RD , tur tuk village then you should go with own personal vehicle.