The unit I use is a Garmin Oregon 450. I have downloaded the GPX files using the last icon on any line in the list of caches in the locality (as requested by me). When I look on the GPSr for the download I can see all details for difficulty, terrain, etc., the file name and from whom and, of course, the co-ords for the cache. Also there is the description and general text which is on the record - but not the Additional hints. It finishes with the logs entered by others for the cache.
My understanding is that pocket queries will enable me to make up a particular and selective list of caches which I can download to my GPSr but I don't see how that will make any changes to the actual cache information (which should include those hints) that will be transferred.
As an aside to my main question it appears that, even where I have deleted the files from the GPSr for a cache and then reloaded them, a few caches have not transferred ANY of the description text, etc.