The biggest problem is that what we have is a generation or two of photographers who learned the craft with an auto focus auto expsure zoom equipped DSLR, or perhaps an equally automated film SLR, in either case equipped with TTL flash. Magazines catering to the pro wedding market no longer run articles on rangefinder techniques and it would be difficult to apprentice yourself to a photographer who shoots Leicas these days.
I agree that trying to work in the style of the great photojournalists of the Life Magazine era is a good idea, say from the 1940's through the mid 1960's when Nikon F's made strong inroads into rangefinder use. For awhile a lot of them used Leicas or Nikons up through an 85/2 but went to the F for portraits with the legendary 105/2.5 and they carried a 180/2.8 for the reach. When fish-eyes became popular they were used on SLR's. The Leica M's had 21, 35, and 90mm lenses on them. If you had Nikon rangefinders you used 21, 35, and 85.
Those guys had nearly unlimited film budgets, but lugging it and changing it kept them from going nuts shooting it. Four to six 36 exposure rolls should be enough to cover a typical wedding start to finish. Shooting more probably won't get you better pictures or put any more pictures in the bride's album. It only increases your expenses.
A lot of thos "candid" pictures in a magazine story, or a bridal album, are posed, or at least arranged, to look candid. You might move the people to make better use of the light, rearrange the veil or the train, have somebody change the angle of their head or the position of their hands, maybe even use a bit of bounce or diffused flash.
Don't show up with less than two bodies, always have a spare flash and extra synch cords and batteries on hand. And some people just prefer the "look" of film. That's why both Kodak and Fuji released complete new lines of pro film in the past year or two. Somebody must be buying it.