Well we all know the USPS is the most common postal delivery service, but, here's very well kept secret, Geo-Cache has a mail service also, YEP! GCDS (Geo- Cache Delivery Service) Now, this service is VERY limited, and, at this point, goes to VERY few locations, BUT, if your looking at this cache, YOUR IN LUCK, you can go check the mail. All you need is a Nebraska Park Sticker to enter the park, then the ability to walk a short distance to the GCDS drop box, oh, and the ability figure out how to open the box (this part is very easy). You may leave small trade or travel items if you choose, might bring some type of ink or lead scribbling tool, and please make sure the box is properly closed when your finished. AS with ALL NICE places like this, be respectful of the environment, leave it as good as, or better then haw you found it