I use a Technikardan 45 and a Arca Swiss F-Metric 4x5 in the field. I start with the largest lens wrap I can find (usually the 19 inch Domke, and use that to wrap the folded camera.) It works well on the Technkardan, but not as well on the AS. Next my bag is a Domke F-1x. I lay the camera on its side in the empty bag. On its side the cameras are both about the entire length of the main compartment, but not the width so I take some other padded inserts and place them between the camera and the wall of the bag (usually the camera is snug up to the side that touches my hip and the inserts are snug the front of the bag. The inserts are stuffed with any additional lenses (I leave one lens mounted on the camera.) I'll also have my compendium hood in there, and my filter kit. The front pouches have the loupe, meter, and release cable. The dark cloth (currently a harrison) lays on top of the main compartment, and with the Arca Swiss, the main rail goes on top of dark cloth. The top of the bag is then closed and clipped. There are two large pockets--on on each side. The are big enough for 3 4x5 film holders each, but I usually only put two in each side so its not too tight--B&W on one side and E6 on the other (I still haven't shot any C41 in large format.)
I started with compact folding 4x5s like the Shen Hao HZX-IIA or the Linhof Technika but I never really got on with them, so I didn't enjoy LF. Then I found a crazy good price on the Technikardan and it lit my love of the view camera process. At this point prefer using monorails in the field to the folding boxes that are so popular now.
The VX125 is a really interesting camera, and It would have been on my short list if I had known about it when I was searching. But today, I have no need for another 4x5. BTW
@B.S.Kumar is a great resource for Toyo parts is you need to add anything to your kit.