How many maps are there?

[DESTARD]

There a 8 targets but is it for 2 on each map?

[Phosphorescence]

4 maps, They each have minor changes depending on your actions during the day but some maps are completely locked out at specific times (since there is no reason to be there at that time)

[Bobble Head Bob]

Without spoiling too much, there are 4 maps, BUT it is possible to have no targets in a map, or even more than two, depending on your actions

[t850terminator]

4 areas with 4 variations depending on time of day

[LoboFH]

And two minor and linear maps with narrative purpose. Other than that, yeah, 4 major maps but with many changes in each time of the day.