Allow me to throw in my two teleporter pyramids.
I ran into the woodlands behind the orc camp (and was already surrounded by quite a few). I drop-activated my teleporter and popped up to a bed in Aleroth. I took the Aleroth bedside teleporter and popped back. I ran north, and had maybe more than 20 orcs trying to get me, when I activated my carried teleporter (brought all the way from Aleroth). Then I ran south to throw off a new bunch, and next, I just walked over to the well, poisoned it and ran home to Mitox.
(Dropping a pyramid at a military camp bedroom and popping in to reclaim the other one, that was a simple matter)
Only one thing I'd reccomend you do differently.
Don't drop a teleporter where you won't see it for lots of trees. Find an open spot. They're a pain to pick up!