I find myself wondering about the the religion of the sami people before their conversion. I heard that Læstadius wrote about their beliefs, but I have heard that it isn't a complete account. I also understand that their religion was similar to the Finnish pagan religion.
My question ultimately is this. What do we know of the Sami religion and what can we assume about it based on other similar religions.
An excellent source on this topic is Louise Bächman and Åke Hultkrantz, Studies in Lapp Shamanism (1978). Sami shamanistic traditions were extremely influential on Finnish and Scandinavian paganism; because of the fluidity of beliefs in a period when things were not pinned down by text and dogma, diffusion of ideas was a natural process. I'm not an authority on Sami religion, so I am not prepared to take it further, but I believe you would find this text worth looking at.