I am sure that there are many new geocachers like myself who live in large cities ( upto a million population ) who are looking for places to place their caches and although their may be grassland . woodland, parkland in the cities many already have caches located their and to place them close to (that as far as I can tell minimum distance 0.1 of a mile between caches ) makes it more difficult so stealth caches may be the only option for some , thats when I think the micro , nano caches come into their own , placing on lamp posts , electricity boxes , fence posts ...
stealth caches have their good and bad points , if you think you may give the game away by visiting why not change the time of day you go to the cache , a night vist for instance
anyways thats just my two pennies worth from a newby cacher