u/ohiomudslide

I have a CRV and If I use a Mag mount I can't get the antenna in my garage.

So I'm wondering about mounting using a hood mount or something like that. My question is, if I use a hood mount I need a ground plane (not electrical but radio wave wise) is it the case that if I attach the antenna to the body of the car it will use the shape of the car as a ground plane? I'm imagining that it's not going to be as effective as a mag mount on a roof?

I'm not without some experience (Ham general license) but that doesn't mean I know everything and I am certainly still learning so much everyday. I'd love to know your opinions and experience. Thanks.