I also have a Bakflip G2 cover. It's on a longbed Chevy. It's pretty water tight.
It has held up to a lot of abuse.
I had it on my last truck for 6 years or so . The same cover has been on my new truck for 2 years now. My cover divides into 4 sections which allows for great access.
I strongly recommend the Bak Flip
19'Duramax w/hips, 2022 Alliance Paradigm 390MP >BD3,r,22" Blackstone
r,RV760 w/BC20,Glow Steps, Enduraplas25,Pedego
BakFlip,RVLock,Prog.50A surge ,Hughes autoformer
Porta Bote 8.0 Nissan, Sailun S637