Say I run the whole Mummy's Mask campaign, where would be good places to throw those two modules in? Levels can be tweaked easily(since it's 3.5 I'd have to modify the modules anyway), but what could I do to integrate them into the story?
From a time line perspective, sometime during book 3, Shifting Sands, is probably best. The first 2 books have the party on a bit of a schedule (well, after part 1 of book 1), and beyond the 3rd book it advances rapidly from what I understand (my group starts Shifting Sands this week).
The party will be 7th level by then, with above average WBL if they have scoured everything.
item spoiler:
This includes a powerful artifact that they won't know how to use fully (yet). It is equivalent to a headband of vast inegligence, inspired wisdom, or alluring charisma (wearers choice) +4 at this point, with a few additional benefits they'll figure out during encounters, and a few they must research.
Hehe, the autocorrect in my spoiler is the win. Intelligence is the word it should be, obviously.