All very good advice folks!
I don't use an external antenna (I have a Maggy 210).
I have my GPS in its case and located so that it rides very high up on the left shoulder strap of my pack. This way, the patch antenna sits as high and horizontal as possible when I need to keep may hands free while on a tight trail, a climb or bushwhacking a beeline. I lock it up good before I head in and during breaks in open spots.
Depending on how far and the the type of terrain, I'm not constantly looking at my GPS. Sometimes I take a bearing from the GPS and shoot it with my lensatic compass. As well, topos and aerial photos help.
As you probably can tell, I like a cache that requires a hike and some exercise, usually to a vista point.
There are many types of caches for types of cachers! All good fun! Happy caching!
tec_64