Mr. Magniloquent
Arcane
My MC hit six right as I entered the Fort. I did not share XP, had a skill-monkey AT, and completed all available areas with exception to the inside of the rat and boggart cave.
You can wait to see if you detect the high Perception check trap at Ratnook before deciding to brave the inside. You don't get any EXP for disarming it so it's worth a shot at lvl five. Boggarts are weak to Will/Reflex so a good Bard has a decent chance to work them over. It's just a lot easier once you get Fascinate.
That's what I did. I disarmed all of the traps, but the last had a DC which told me I was in the wrong neighborhood. The boggarts were just a bit too much at that level. It would have required me to rest more frequently than I liked, which is why I left it for later. My MC had considerably higher xp than the rest of my party. When I returned later with a lower limit of Lvl5 in my party, the cave was cleaned without a single rest.