I used dynamat. Yes expensive ($320) but what a difference. My truck goes THUD when I close the doors. I did the firewall, toe board, floor, back wall, roof and doors.
https://photos.app.goo.gl/lcpRZy5ACNZiyRJq2I didn't put it everywhere but cut it to shapes and laid it down. You can see in the pictures some gaps, but coverage was extensive. Then I layed over top aluminum foil insulation everywhere and wow. The truck sounds solid everywhere.
As for the inside of the doors, I cut the matting into squares and rectangles to avoid the balled up mess I also had on my first attempt. Worked very well in little patches. First road trip I'll let everyone know how she rides and sounds.
