I would suggest INVISIBILITY and FLY. How can you leave a scent when you are not touching the ground?
Another option might be to POLYMORPH into orcs or worgs. In addition to smelling like something that belongs, it tends to negate the need to Hide, Move Silently, and be invisibile.
If you are limited in the number of POLYMORPH type spells your wizard can cast, the old, "Hey look, I've got some prisoners!" routine seems to be tried and true.
A third option is to bring along something the worgs might like to eat. Sure, worgs (INT 6) are a little more intelligent than wolves or dogs (INT 2), but they are opportunists and only hunt humaoinds when they can't manage weak or sick herbivores. Carry some raw meat and you might be able to convince the worgs that (hopefully don't) find you to snack on that instead of you.
Additionally, with a Will Save of +3, Charm Monster might work. Heck if you can cast Charm Monster and have a Druid or Ranger with Wild Empathy and Handle Animal (3.5) or Animal Empathy (3.0) then you might even be able to charm a worg and convince it to help you avoid the orcs and other worgs...
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durin