cam seal is an easy job vita, even for a novice like myself.
remove spark plug cover
remove rocker cover after disconnecting oil breather pipe/earth wires etc.
unplug spark plug leads, check for oil in spark plug wells, if there's oil replace the 4 x o-rings.
remove exhaust cam plate, i think it's 10 or 12 bolts.
remove vtec solenoid, 3 x horizontal bolts that screw towards the block.
once cam plate is removed you will be able to lift the old leaky seal out.
replace seal and put it all back together.
probably worth replacing the vtec solenoid gasket whilst you're at it.
oh and whilst the rocker cover's off you've got a great excuse to nitromors and re-paint it