Drilling holes in trailer roof to install solar: worth it?

I mounted panels to my plywood roof with screws over 15 years ago. No leaks ever. I'm not all that handy either. I ensured that I was hitting the cross members and not just the thin plywood. I squeezed a little caulk in each hole before screwing into it and left a layer of caulk between the brackets and the roof, and then used good self leveling caulk over the top of the whole thing.