1. Cut plants and find some trees to hang them in upside down. Depending on rain, let hang 7-10 days.
2. Remove and dispose of grow evidence (i.e. stem and rootballs) before leaving site.
3. When plants have dried for 7-10 days, trim all fan leaves and rough trim the rest.
4. Cut up with a goal of removing as much stem as possible and fitting in 5 gallon buckets WITH an o-ring lid.
5. As an extra precaution, get a paint tray, brushes, rollers, dropcloth and throw them in the trunk. Prior to this, you will have smeared some fresh paint on the tray and dropcloth.
This process reduces weight of transported product and should eliminate odor issues. This is a probability game and you need to maximize your probability of successful transport.
I don't give a damn how you pack fresh, wet, plants - the odor is not maskable and you WILL be busted if you are pulled over. All these ideas about masking odor as "garbage" or whatever is nonsense to me. Unless you are a Hollywood quality actor, you won't pull off these "garbage inspection" scenarios. That's just asking for a jail sentence.
The major disadvantage to the proposed method is that harvest season often coincides with the start of hunting season. Depending on the hunting presence in your area, discovery by a hunter is a possibility. They will take the plants, guaranteed.