NOOOOOOOOOOOOOOOOOOOOOOOO!!! Don't do it. Not even for the herbs, depending on what they are to be used for.
Long story short, what do you want from your hops? Bittering (alpha acids) and flavor (oil). Alpha's don't degrade until you hit 140F, so you are probably OK there. Plus, most people don't know the alpha level of homegrown hops, so they use them for dry hopping or at least late addition.
What's the boiling point of the oils in hops? Some are below 100F. Putting them in a hot truck will evaporate a lot of those.
Additionally, when the hops dry, where does the moisture go? Into the bag? No, it goes into the air. So if you put them in the bag, that restricts the amount of air can get to them to remove the moisture. Plus you are locking them up in a relatively well sealed up truck that will hold onto that moisture. When it cools off that night, all the moisture will condense on the windows and run all over the dash. Hops hold A LOT more moisture then most herbs.