Visit to Kailash Manasarovar

I am a Canadian citizen of Indian origin, living in Quebec city. I am planning a trip to the holy place of Kailash Manasarovar (near Darchen) in end of July. I will be doing the package tour with the agency Trips to Temples, which will start from Kathmandu and go to Kailash via Lhasa. All the people on this trip are from India with an Indian passport. However, I was told that as a Canadian citizen, my visa and permits will have to be done separately and take more time. Can I get all my permits for this trip done from Canada? Please advice.