I know you asked about tool bag or backpacks and I've looked at them including the bucket bags but I ignore them. Of course I started with what I have long before the bags became common. The rolls I tossed years ago, didn't like them, and I had some good ones.
I looked at your link and that pack looks decent. At this point though I won't change but it could work and then as you go some of the tools could be
setup permanently as you learn what is needed.
For some of the "BOAT" tools go to pawn shops where you can get some decent tools for a not bad price. Or even estate and garage sales.
I ruined my nice steel boxes but also the steel ones if not handled carefully dinged and damaged a few things.
I keep the common use tools and boat specific tools aboard. I use several small plastic tool boxes.
One for the screwdrivers, electrical tools and knives.
One for the 1/4 drives
One for the 3/8 drives and comb.wrenches up to 13/16", Allen wrenches.
One for the 1/2 drives and large wrenches up to 1.25. 3/8 bend beam torque wrench, filter wrench, hammers, hacksaw and blades, files and so on.
I use a tool tray, plastic, to carry tools around the boat although that doesn't always work as inevitably I leave some thing aside.
Of course not all fits in these bins but they contain most of the larger tools and in reasonable order. They stay aboard the boat.
I use other small boxes/bins for supplies such as screws and bolts, gaskets, sealers, lubricants,. The few metric sockets and wrenches needed are in a large peanut butter jar.
For the really common use tools such as specific screwdrivers, small wrenches, nut drivers, pliers I made some Mickey Mouse drop in holders so I do not always have to dig through the boxes. There are some job specific tools I have mounted nearby their use point such as the stuff box wrenches I made along with the through hull wrench.
A battery drill lives aboard with drill bit index and countersink, screw driver bits. A DMM, live aboard.
For the larger tools such as grinders, sanders, more powerfull drills, planes, large bars and files, more serious and expensive electrical tools and so on I bring them down as needed using buckets or Rubbermaid bins.
Of course boat size will also dictate what can be done.