I have the Bananahobby Skysurfer, which as you will know is ALMOST the exact same plane as the Bixler. I can confirm that this plane comes with wing screws. I have had two of them in the last 3 - 4 months and both bodies came with screws and a decent mounting plate right uder the main fuselage. The first plane I put together I added glue to, but when the plane and the ground had its well known arguement, the body of the plane lost. I managed to save the two wings which I have reused in the second body. This time I didn't use any glue. It works very well and holds well in the air.
I don't know if Bixler has added this to their plane it would defenitely be a plus to the model. I read somewhere that they had, but that could have been an error, mixing the two models up. Certainly would be worth it!
I have plenty of room in my car to fit the plane in complete, however my wifes car is smaller and I take the wings off to fit in there. Both works for me!