Hey there is a difference in which kind of tournament u get this hand. in a freeroll, where the most players are very loose, u should have to raise big preflop, because protecting doesnt make sense. Most players call there very many hands and the danger that weak hands get a good board and get stronger then u is too big. In smaller SNGs and with enough knowledge about ur opponents it could make sense, to play KK or AA slow.

Well there a so many ways of playing these cards, because there are so many kind of situations. But u find good strategie articles in the internet, they may help u

good luck at the tables