When the storage doors are fully open upward, there is very little weight or pressure to hold them open. All the weight or pressure would be downward on the hinges (I would think). I feel that I should try the 3M Molding tape first, then it doesn't hold over time, I will drill holes.
I feel sure the 3M tape will hold, for a while at least. That tape holds car molding on for years....
From Cajun Country
Jayco 2016 Grey Hawk 29MV Champagne
Toad - '16 Subaru Forester (Pearl White - manual transmission)
Blue Ox (everything) for the TOAD