In short I'm picking up my life from California and driving to Colorado this summer. I basically have to fit all of my Necessities inside of my 2002 Camaro. The only way I'm going to be able to take the things that I really need is by using a roof bag on this trip. my car does not have a roof rack and it's also a two-door car. Most guys out there have instructions for installing a roof bag either with a roof rack or if it does not have a roof rack it's usually instructions for A4 door vehicle. My question is, can I safely attach a roof bag to my two door car without a roof rack in any way? I simply cannot take all of my necessary possessions for a 4 year + move inside my car. Thank you!