Do you mean smell when you exhale or smell when transporting?
If exhalation, vapor smells no matter what kind of device you use. The terpenes are what give it that distinct scent and they vape at temps lower than thc cbd etc. The good news is that since you're vaporizing it, the smell dissipates quickly (15-30 minutes in a room, 2-5 minutes if at all outside), doesn't stick to your clothes or hair, and, in terms of evidence, leaves you only with a funny taste in your mouth and your eyes red as the devil's dick, if you'll excuse the Pineapple Express reference.
If you mean transporting, that'll depend on what you choose and at what level your herb is vaped. If you find a vape with a closed chamber you'll be golden (MFLB, Iolite, etc). The Solo can smell a bit due to the chamber being right below the mouth piece and near open air, and also if you don't clean the mouth piece chamber often. I find that freshly grounded herbs smells more, while halfway-vaped bud smells less (you vaped off most of the terpenes already).
If you keep your herb in a separate containing while transporting and only load it for when you vape, you should be golden so long as you keep your vape clean. Good luck!
