Pros and cons of moving gas filler to the trunk

Gas keeps backing up and sloshing on my paint when I gas her up, before it ruins my new paint job I’m thinking if relocating the fill to the trunk floor.
Has anyone done this, looking for suggestions and for pros and cons, the obvious smell could be a Problem but with a sealed cap would only have to worry about spill over, at least it’s not going to ruin my new paint.