The 760 is a good unit but one has to take the TIME to READ the MANUAL and play with it for awhile in order to get the most it has to offer. I know I'm one of the worst to simply power it up and go, but if you take some time to get familiar with it, you'll find it meets most of your needs. As far as Corps parks etc...good luck with that...:)...your best bet is to download a POI (Point of Interest) loader and then go to POI Factory and download whatever interests you...you can find them both by clicking on the link below.
Also, IF you're interested, I've linked your previous post....:W...I don't mind having the question repeated but I understand OldMan's issue too....Dennis
Garmin POI Loader and Factory
GPS request