...Elevate this antenna even twenty feet and you VERY SIGNIFICANTLY increase your range over flat terrain...
Modeling suggests that raising an antenna from 5' to 20' gives a 10dB gain over flat ground
at a distance of 10 miles. That's equivalent to going from 5 watts to 50 watts without
increasing the battery drain.
In practice it can be even more, especially in gently rolling terrain, and that's in addition to
improving the antenna over the standard rubber duck.
When I worked for the Forest Service in Alaska there was one valley where I couldn't
hit the nearest repeater on my HT, so I climbed up a 30' spruce tree. Still couldn't hit
the repeater (which was behind a ridge) but I could reach the dispatcher's remote base
on simplex - 90 miles away. That became the daily routine - at the end of the day the
rest of the crew would pack up the equipment while I climbed the tree to call for the
helicopter to pick us up.
As for Zombies, I spray around the house with Deep Woods Zombie Repellant and so far - no zombies. Naturally, I never leave human brains laying around outside after dark where they might attract unwanted attention - that's policy.
I've had good results with "Zom-B B-Gon" in the convenient pump spray bottle.