I'm assuming that you are going to be transplanted into soil, then outdoors?
It is very possible to get cloning success rates of 90%+ but it takes practice.. many people find that cloning is one of the tougher jobs.. especially first-timers.. once you get the method down, cloning is an easy task..
Some strains are tougher than others to clone.. so pay attention to what strain u have and try to find background info on it.. i've heard that Jack Herrer (sp?) and some Blueberry strains are tougher strains to have root..
You can definitly cut a clone - dip in root solution - transplant into soil.. you DONT have to use rockwool.. it just seems to be easier..
Also look for the DIY aerocloner.. cuttings root quickly and then u can gently transplant the clone into soil
Not to be a ass... but if u check the FAQ's and search around a little, there are many, many thoughts/posts on cloning
***** keep in mind that if u are ordering 10 seeds, you will only get 1-2 females with optimum genes that are worth keeping.. that means u will have to clone a round of mothers from your 'super fem(s)' and then use those mothers to have your 150ish clones