Well, about the whole bewbies thing (yeah I said bewbies, lol), I have found that I have a sorta masculine shoulder structure, so I kinda try to shrink my waist and go for very small ones that won't draw attention to me upper torso... I used a pair of nylons for a very long time with a padded bra, works pretty well but after long bouts it still irritated my skin... Eventually I ended up buying the foam rubber "sleeping and travel" breastforms from some online store, they were alot cheaper and are easy to hide in a backpack, etc... hehehe... I finally got silicone forms and they are really nice, but I think anything that LOOKS natural is good....
Here's 2 things you could try if you really want them to "feel" real, but mind they will be a little hefty and you'll need a pretty full bra to hold 'em in place lol.. 1) take some cheap walmart nylons (bulk pack good lol) and fill the bottom with birdseed, the finer and lighter the better, then tie it off and put another nylon over it, and another over that, they won't be terribly comfy, but they will have a little movement to them and you can squish em around. OR 2) you can do the same thing but fill the stocking with some rubber fishing worms (not the scented ones or you'll smell like fish ROFL), you may want to wash them off in some warm water and some nice-smelling bath oil or something to lose that "fresh rubber" smell hehehe... I've tried both and they work, but as I said, both are on the heavy side, compared to actual breastforms... If you don't care about feel or movement, foam rubber is your best bet... (Edit: BTW, if you try the stocking thing, tie all the stockings on one side lol and cut off the excess before putting the next one over it. The knots should be down and against your chest... usually this will press in an lift a tiny bit for a tiny bit more of a "cleavage" look)
As for hiding the member, a gaff if you're not minding a little discomfort... alot of my clothes are really revealing (I like to flash my legs off... teehee) and I can usually get away with just a tight pair of panties, or even snugger is a brazilian-style bathing suit bottom... good thing about them is they look just like a pair of panties but have a little less stretch, breath a little more, and stay snug no matter which way you move...