Thanks go out to blackbelt519, fatbert, DrAgOn SlAyEr 9, ste123u, TallgeeseIIII and everyone else who contributed. Precise descriptions of each place if you struggle to find them can be found in the original thread :
hey, i just posted in the other topic that i'm working on a map myself, don't mean to compete with you so do you mind if we collaborate? i made a high resolution map of stilwater, that combined with your island locations could save us both time and release a higher quality map.
ah perfect! by tonight we should have a nice, accurate map, i'll confirm all those locations with a new profile, and hopefully we'll come closer to a true 32/32. i think the secret areas are this missing 43rd vehicle unlockable, personally.
i have 3 vehicles yet to be unlocked, and i have the barnstorming, the tow truck and the secret areas left to do, i've done absolutely everything else.