So i finally pulled the trigger on an R3 and man this thing is way bigger in person than I thought it would be lol. I have a trip coming up to the Olympic Peninsula next month and since it rains basically 24/7 there I need something actually weather sealed and not just a water resistant backpack that is gonna soak through after ten minutes. I am mainly looking at the Pelican 1535 Air because everyone says they are the gold standard but then I saw the Nanuk 935 which looks way more comfortable to carry with those powerclaw latches.

My biggest worry is if the R3 fits standing up with the integrated grip or if I have to lay it flat which wastes a ton of space. I also gotta fit my RF 70-200 and my 100-500 if i can squeeze it in there. My budget is around 250 to 300 bucks so i dont want to go too crazy but i really need to keep my gear dry while I am out on the coast. Does anyone have experience with these two for a pro body like the R3? Or maybe the Vanguard Supreme 53D is better since it comes with that bag insert instead of just the usual foam? I am leaning toward the Pelican but those Nanuk latches are calling my name... just wondering which one actually holds up better in real world mud and rain.