John,
I've had good luck mounting them at various heights, from ankle height angling up, to 10 ft up angling down. Just play with the settings to get the best coverage. A lot will depend on how quick the trigger is. My old stealth cam needed a few seconds to fire and height was a disadvantage. I got a bushnell tropy cam for christmas and its fast trigger time is adaptable to all kinds of mounting situations. If your willing to bring a ladder or gaffs with you, I think you can make it work. One of the lock boxes and a python lock help a fellow to sleep well at night also.