Wow, we are covering alot. The best post has been go with a friend or take someone w/ some trolling experience.
Here goes. King Mackerel -I troll 700 RPM, 100 rpm over idle(single 225 on a 23.5' boat) I mainly stagger my lines to avoid tangles, Kings don't seem to care where the lines are. If you like to turn right, put the shortest line on the starboard side of the boat (left flat - confusing? cockpits ignore marine protocol). I use one down rigger, one line with a weight (varieswith conditions) and stagger two lines. Start off trolling w/ two lines, as you get experience add lines. If I have a hot bite, or haveinexperienced help, or have heavy seas, winds etc, I may troll only 3 or even down to 2. 4 tangled lines do not catch fish. I troll with either what I call a traditional rig for dead bait (single wire, single hook, w/ a loop through a cigar minnow's eyes, and a decent sized skirt). With live bait, I use what I call an ambush rig, I think others call them South Carolina king rigs. I use 60# sevenstrand, two Eagle Claw 4xTrebles and one Mustad 94150 3/0. Both of these rigs are pre-made in tackle stores. Buy some and figure out how they are made, then you can make your own, plusthe forum or your favorite tackle shop will help. The live bait rigs have fairly small skirts or small squids. I also use the ambush rig w/ dead minnows.
I troll skirted ballyhoo from 5-7 knots. 2 flats, two rigger, one center rigger. If it is only ballyhoo and I like where I am, 5 knots. Typically I troll 7 knots, w/ 2-3 lures and two or 3 baits. Still5 lines on my boat w/ my crew, as more lines would cause chaos.
I don't really know what stretches are. When I troll Wahoo plugs I use Yozuri bonitas or Rapala 18s and troll about 8.5 knots (10MPH)
Again, king don't seem to care where the line is. The largest king I have caught ate at the boat.
Trolling offshore w/ lures and baits 2 flats on about the 3rd wave. Your want clean parts of the wake (very hard on outboards), then I run the outriggers where ever the baits look like swimming bait, same goes with the center and I try to avoid white water from the wake.. I try to set it up, where I do not have to worry about tangling lines, butit still happens........
If you are trolling offshore in high winds, you may want to add weight to some of your ballyhoo. Also, put the upwind lines shorter than the down wind lines. This works if you a trolling one direction, therefore, you have to adjust if you change directions in relation to thw wind.
Wahoo, if the lures are running deepplacementshould not make a difference, but be safe and run 'em long so they have a chance to see the lure. I guess for what it is worth. Whites and Dorado tend to like long lines. A blue doesn't mind scratching up the transom. Most of my wahoo have been long.
Fast trolling w/ planners or downriggers will be tough. Also, there's not much sport trolling w/ tackle that can hold up to the planner.
Look at Florida Sportsman, Saltwater Angler, etc and search for trolling articles. George Poveromo, editor of one of the mags has some pretty useful tips in his books and on his sites.
Feel free to ask questions.
Tight lines and good luck