Indeed, I use straps constantly when stacking on a trailer. I mean I put a bale, I strap it, I put the next, I unstrap-strap etc. but that's not an option when stacking at a storage place, like a barn. Putting the next bale could destroy the stack and much time of work. What I do is saving the game after a bale is placed on the stack successfully. Not really efficient but the only workaround I could find. I don't know if someone has a better method.