High CR traps - without special treatment - are usually not worth the paper they're printed on in 3.xe. Remember, Search is a static, repeatable check, and Disable Device is a solo skill, rather than a group effort.
In other words, the DC the DM sets either allows the rogue to bypass the trap, or it doesn't. There's precious little the rogue PC can do, and the rest of the party is just in the back cooling it's heels.
Pathetic. ....and boring.
To do a high CR trap right, you need to think of it as a "monster", and stat it up accordingly, with attacks, hp, special abilities, and vulnerabilities. You need to specifically design it so that it engages the entire party, and that defeating it isn't predicated on rolling 1 die. And you need to remove the notion that a trap must be engaged by walking through a room ('cause at high level, who walks anymore?).
To create a true high CR trap, you have to throw out the DMG design guidelines, and design it like any other high CR encounter.