I Would like to take a trip to The Grand Canyon.?

Id like to take a trip to the Grand Canyon sometime this summer. I'm not sure that will allow me enough time to plan the trip. Ive looked into it a lil and it seems the North Rim may be my best bet. It would be just my boyfriend and I. (we do not have any children) I want to camp beneath the stars and maybe do some floating but I do NOT want to get lost or travel too deep into uncharted territory! =) Just want to enjoy a beautiful piece of America. I need suggestions and references from people who have done similar trips to help my planning along. Thank you.