Long term storage

Hey all, long time lurker with a question. I just got an offer for a 3
yr posting far-far away (half a world actually, just heard they got
their first private aircraft). Anyway, looks like I'll be parking my
beloved Velocity for quite some time - not willing to sell her and
their are only a few I'd trust her with and leaving her with them
hasn't worked out. I plan to pull and hang the wings and have the
engine pulled, crated and pickled. What I don't know about is the
interior and avionics. I have a beautiful Garmin 430 and audio, a nice
JPI engine monitor, an ADI Pilot II with battery backup and some other
goodies. I also worry about mold issues with the interior. I live in
Ohio, so we see pretty big swings in temps/humidity. I've considered
paying a local teenager to pull/place a couple of the of the
rechargable humidity control do-dads to protect the interior, but
really worry about the avionics. Should I pull the stack and put it in
my parents basement? What about the AH, TC and DG, do their bearing go
bad if they sit for 3 years? Anything else I should be concerned about
or haven't considered? All thoughts welcomed.

Thanks,
Jeff