Zig, I'd go for the goodbye hug - but you know me (I'm a recidivist pursuer!).

My H went OS for a week recently and I used the occasion to give him a hug and wsth him a good trip.

He responded well.

You never know how they'll react, but you might as well give it a go.

Might give him something to think about while he travels. Wack on your best perfume and sexiest dress, and go in for the nonchalant kiss/hug.

Be your full-on sensual self and be damned!