My normal shipping method is this:
1. Kraft paper (the same length of the tube minus about 1")> Print > Tissue Paper. There should be 3"+ of paper on either side of print.
2. Gently roll print to size that is about 1/2" smaller than the diameter of the shipping tube, and tape. If you are a Gorilla, get someone that is not a Gorilla to do this step for you.
3. With small bubbled bubble wrap, wrap 1-2 layers around center of print (at least 8" wide) with smooth side out. This should fill the gap left in from rolling slightly smaller than the diameter of the tube.
4. Insert said print into tube, making sure that the bubble wrap is in around the center of the print.
5. Dry fit end caps and check for any slippage. I shake the SHIT out of the tubes to make sure that the print is not moving at all. If there is any movement, I will pad 1 side of the tube with same bubble wrap, bubble side towards the print, and cut slightly larger than the diameter of the tube so that when the end cap is put on, the cap pinched the bubble wrap to hold it in place.
6. Cut excess bubble wrap (if used) on the outside of the tube, and tape the shit out of the end caps... Tape is cheap. I also will wrap tape across all the ends of the tape that were used for the end caps, around the circumference of the tube to make sure they are not pulled free in transit. Don't know if the last step matters, but like I said, tape is cheap.
7. Print a shipping label for USPS PRIORITY MAIL, INCLUDING INSURANCE FOR THE PURCHASE PRINCE OF THE PRINT!!
8. Go to post office, wait in line, and have them verify the weight and shipping cost is correct, then SCAN the package into their system and get a receipt.
9. Go home and count my monies...