I just ordered a used Domke Outpak backpack. I have been able to find several reviews of the product but I can't find the specifications (size dimensions). I bought the pack to carry on a trip to Wyoming/Yellowstone in January. Has anyone who owns this bag had any recent experience flying with it as a carry-on? I'm afraid that the bag will be too large. One older review that I read said that it easily fits in the overhead compartment of most planes, but I believe this review was written prior to 9/11. It's been years since I have flown, so I'd appreciate any feedback and/or guidance from knowledgeable persons.