That's a lot of weight. My tours always consisted of rear panniers and tarp, sleeping bag, pad and tent which was about 10 pounds less.

On a much more important note, you may do damage to your knees/body if you don't train your body for the ride. Why you'd pack it all on and go out for a test ride instead of little by little over weeks is beyond me. By doing it properly, you won't feel the weight difference.