I purchased one of the 22" Blackstone griddles from Walmart and have had zero problems with it. It does require you to season the griddle, but that only takes a couple of hours. I have used it for camping several times, and it has never let me down once. Once the griddle is seasoned, cooking on it is easier than cooking in a non-stick skillet at the house.
For transport, I went to Harbor freight and bought one of their moving blankets and a package of tie-downs. When I am ready to pack up, I lay the blanket out on a table, set the griddle on it, and wrap it up. I then take the tie-down straps and secure the blanket. The blanket has protected the griddle and the tie-downs give you a handle to grab when you move it.
This griddle is probably one of the best camping purchases I have made to date...just my 2 cents.