Just a note, normally I do the dice rolls and report the result. I don't mind if you use Invisible Castle as it saves me some work, but for the likes of Hide and Move Silently I prefer to do the rolls myself and leave them unreported. This also goes for other skills where the outcome is uncertain, usually including Appraise, Bluff, Decipher Script, Diplomacy, Disguise, Forgery, Knowledge, Listen, Search, Sense Motive, Sleight Of Hand, some Spellcraft and Spot.
As this is a non-hostile situation and the modifiers are so high anyway, I'll let it slide for this occassion.
"Do you think the apes are the cursed ones?"
Yes. Preparation. Party waits while combination of small ape and hunting tiger (dynamic duo, but much more subtle) enters for scouting purposes. Their footfalls lighter then shadows touch and their eyes and ears as sharp as dragons...

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.