Portable tool set ups--in port
If you can comfortably carry everything, at once, in 1 or 2 backpack or shoulder bag or briefcase, so much the better. But at some point the weight and/or bulk of tools and materials (or parking distance) become too great.
Within the actual boatyards, around here, workers use heavy duty 4-wheel carts plus portable "carpenter-style" tool boxes which are setup specifically for the jobs for which they specialize--replacing zincs and cutless bearings, r&r-ing shafts and propellers and through-hull fittings, underwater and topside repairs of all kinds...
However when work must be done away from the boatyard, tools and materials must be transported more conveniently. For this, an inflatable dinghy is very useful.
From one's car or truck, a 2-wheel handcart is easiest. Keep in mind that parking distance to the vessel might be great, and will usually require navigating narrow, and sometimes tippy gangways or docks. In this case I manage with various soft tool bags plus a large, heavy duty, plastic tool box which is also useful as a workbench as well as a step. One general purpose tool bag is augmented by separate specialized bags.