The only reason I can think of for doubling up on some gear, i.e. wet weather gear, is in case something happens to the first set, you've got a spare/back-up. While this is great for those who have the cash and space for it, it makes more sense for someone getting started to get all the essentials before worrying about redundancy. While you mention three kits, you don't explain whether they're "layered" or stand alone. With a layered approach, your EDC is the basis for the other two kits, followed by the BOB, which supplements it and makes life more comfortable/safer/easier to maintain for a longer period, yet is still (at least in theory <img src="/images/graemlins/wink.gif" alt="" />) portable, followed lastly by cached/stashed/whatever longer term supplies that you (hopefully) can sit on and ride a yet longer term situation out with. If you're using the stand-alone approach, then your EDC has a clone in your BOB, which has a clone in your "Full Dress" kit and you have duplicates and in some cases, triplicates of items on hand. If you have the time/money/space/inclination, this isn't a bad idea, it gives you spares to use yourself or trade/barter for items/services that you want/need but don't have, but, at least in my opinion, it makes more sense to get the "first" of everything you want/need, before you start aquiring copies and spares (unless the price is a "can't pass it up" deal, in which case you might be able to swap for something else too), but this, of course is just one humble oppinion <img src="/images/graemlins/wink.gif" alt="" />.

Troy