Well, my interests don't align with yours but I can still be helpful.
Your best bet is a Macro Filters and/or dedicated Macro lens wile a Macroenabled zoom lens will work. Bellows units and extention tubes tend to require longer exposures that are not ideal for moving subjects or outdoors use. DOF with Macro is razor thin so you want to stop down a bit if you want good sharp macros reguardless of the equipment used.
Macro filters are a good start, they can be used on any lens that has that particular filter diameter for any camera, These are not going to slow down the lens enabling you to use faster shutter speeds needed for handholding provided the lens is fast enough it self. The numbers indicate the filters magnification power and can be stacked or used individually for different levels of magnification. I own two sets, A set of Tiffen 1,2 and 4 at 52mm and a set of Vivitar 1,2,and 3 at 58mm.
Dedicated Prime Macro lenses are not only the pinicle of macro lenses they are also one of the best starting tools. They are commonly slower than regular prime lenses both in max aperture and AF speed, But they are extreamly sharp. I own four manual focus dedicated macrolenses Canon FD Macro 50mm 3.4, Canon FD Macro 100mm 4.0, CPC Macro 28mm 2.8 (M/MD), and Super Macro takumar 50mm 4.0 (P/M42). Yeah you have to buy a lens, but contrary to it's name it is not really dedicated to macro, you can use it for other things as well. If you look around you will read amout Macro lens owners using these for protraites and whatnot due to their superior quality. One draw back is that many of these lenses stop at 1:1 some fall short of it requiring a little more to push beyond 1:1.
Macro Enabled Zooms are by far the most versital in the field, but that versitility comes with the sacrifice of macro ability and image quality, I have not yet seen a macro enabled zoom lens capable of 1:1. Unlike Macro filters they can go from macro focusing to normal use without having to add or remove anything from the lens. I own three macro enabled zooms Sears 60-300mm (C/FD), Gemini 80-200mm (C/FD), Vivitar 70-150mm 3.8 (M/MD)
Taken with stacked Tiffen Macro Filters on Canon FD 50mm 1.4 on Canon EF
Taken Handheld with stacked Tiffen macro filters on Hoya 81A on Nikkor 50mm on Nikon FM (uncropped full frame)
Taken with Kodak C-743 (yeah, that is a point and shoot) through stacked Tiffen Macro Filters
Taken handheld with Canon FD macro 50mm 3.5 on Canon EF
Taken handheld with Gamini 80-200 on Canon EF
My favorite Macro
Taken with Stacked Tiffen Macro filters on Canon 50mm 1.4 on Canon Bellows FL on Canon EF
See the thread here