Here are links to maps and guides that will tell you everything you would need to know to find hidden packages, items, stunts, rampages, and odd jobs. (The hidden package guide was created by Teliko21 and follows the maps from chunkubis, who did all the maps below.)
Portland: {Packages Map and Package Guide} - {Items Map} - {Stunt/Rampage/Odd Job Map}
Shoreside Vale: {Packages Map and Package Guide} - {Items Map} - {Stunt/Rampage/Odd Job Map}
Staunton: {Packages Map and Package Guide} - {Items Map} - {Stunt/Rampage/Odd Job Map}
Portland: {Packages Map and Package Guide} - {Items Map} - {Stunt/Rampage/Odd Job Map}
Shoreside Vale: {Packages Map and Package Guide} - {Items Map} - {Stunt/Rampage/Odd Job Map}
Staunton: {Packages Map and Package Guide} - {Items Map} - {Stunt/Rampage/Odd Job Map}
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