BaseCamp FYI's
The maps are identical between the 760 and 770. I base this in the fact that when I purchased my 770 I had the latest maps on my computer from the last update of my 760 and Garmin Express did not need to download any new maps, it installed the ones already on my computer.
When using BaseCamp you need to select a option in Garmin Express to install the maps on the computer. By default it will only install on the GPS. You can re-run Garmin Express to install the already downloaded maps to BaseCamp.
Add functions and tools to the toolbar as soon as you figure out what you are going to use so you don't have to dig through the menus all the time.
One of the biggest issues I had when I started with BaseCamp was how it stored your data. I was used to stand alone files residing on my drive where I would open, edit, save those files as needed. BaseCamp does not use that model, instead it stores everything in a database modeled after the Windows Explorer with folders all under the master folder "My Collection". You can have sub folders but all objects (routes, waypoints, tracks etc.) are stored in Lists that are in a folder. Basically everything you create is automatically saved in the database. Even though it is easy to move objects around a plan to organize the folders is a good idea to start with.
Another thing that will bite you is that once a object is created it can be copied to other lists but it only exists in the database once. For example, say you create a waypoint for your house and stored in a List called "People" which is in the folder called "POI". In another Folder, say "Trips" there is a List called "2017", you copy the House waypoint to it. Later you decide you no longer want it in that list so you Delete it....wrong. A delete will remove that waypoint from the database, that is ALL occurrences in every list it's in. To remove an object from a list without deleting it you need to use the "Remove From <list>" command. Any modification to a object in one list will also effect all occurrences.
Don't attempt to use the "Trip Planner".
The BaseCamp (Mac or Windows) section of the Garmin Forum is a good place to review.
I do not want to write a instruction manual here, I just wanted to point out some issues I had learning BaseCamp.
I currently have over 11,000 objects in My Collection organized in many folders and lists. A big part of that is a library of RV parks that I have verified location on.