Keeping it in the case will help to slow down any changes in temperature or humidity, but if your house is kept at a fairly steady temperature, then shifts in humidity should take a long time, like a week or two, to affect your guitar.

Like I said, visit Mark, preferably on a Wednesday or Saturday, and see what he has in the way of advice. He can seem like an opinionated old fart sometimes (it takes one to know one :) ), but he knows his stuff, and someone who can examine your axe in person always has better information to base an opinion on than someone (like me) who is thousands of miles away.