How do I replace the cam seal on my 2005 Saturn Vue? on 2005 Saturn Vue

I recently got an oil change and they said I had an oil leak from my cam seal. I want to do it myself. Will I have problems with putting the timing belt back on if I don't have the timing belt tool for this vehicle?
Also, is this a difficult repair or manageable?
Thanks for your help!

Asked by for the 2005 Saturn Vue