Try editing the size. I find 720 max width or height is a good size. If you use windows, right click on the image and click edit.
From there you can edit the size in paint.
Click the resize button, click pixels, and change the largest number to 720. Click save and you are done. Image is now large enough to see some good detail but fairly small in file size.
Can't wait to see your pics. I have used VHT on several vehicles in the past. It's been a while since I have done it but I was never bothered by the local LEA.