If you've had to travel with a combination of personal luggage + camera equipment before, then these transforming roller bags may be of interest. The Porter Cases are unique rolling cases that convert from a carry-on sized travel roller into a hand truck a.k.a dolly that you can stack up to 150 lbs of gear on. I can see how this could make life a little bit easier during travels.
From what I can tell there are two main Porter Rolling Case models. One is the The Porter PCX Lite Roller which is a semi-hard carry-on sized hard case (just the sides). The other is a complete hard case (think Pelican) which are sold under several different models, due to the interior you choose. For example, there's a version for computers with an organizer lid, and another for Camera Equipment that has padded dividers and foam.
Porter Rolling Hard Case - eBay
The Porter Full Hard Cases are made from injection molding, have a built in combination lock which is handy when you're walking away from your bag at an event, and offer gasket seals around the lid to help prevent moisture and dust from creeping in. Maybe not the best looking cases, but i'm most interested in the functionality of the Hand Truck feature to cart around extra luggage after a trip to baggage claim. You will often find them cheaper via eBay (click here).
Porter PCX Lite Semi-Hard Camera Carry-On Case + Hand Truck Cart Dolly
Porter Carry-On Water/Dust Resistant Full Hard Case + Hand Truck Cart Dolly