Garg - much as I hate to state the obvious - woods are few and far between in London City, New York City, Alaska and Peking... and even then, you aren't allowed go in half of them and certainly not take stuff out of them.Most mistletoe sold in England comes from France (la guise or gui I think it's called - odd that it's feminine...), where they haven't had all their hedges demolished to create bigger fields (see the farming thread) so have good, mature trees in them.
Besides - you ever tried climbing a 50 ft tree with hands full of clippers and bag?
LTS