> Why bother?
The only reason for me is to get a rough idea relative to previously recorded rough ideas.
That said, isolated altitude readings are very useful. For example if I start out at 5,000' and my hike is 5 miles to 10,000' then it's more useful to know how high I am (or how many more 1,000s I have to climb) than to know how far I've gone. For this purpose, an error of 3' or even 30' is irrelevant.
one or more gifts or other benefits from the co-op.