AP US government may be a substitution in place of a commonly required (for high school graduation) civics / government course. So it may not necessarily be the case that dropping it will open an elective space in the schedule. AP human geography is probably the lightest of the AP courses (some high schools use it as an honors 9th grade social studies course), so it should not be assumed that the AP label on that course implies that it is a difficult or high workload course.
The OP’s proposed 5 AP courses in senior year are all among the lighter ones. It would not necessarily be too much work to take all of them. However, the OP should only choose the ones that s/he is interested in as academic electives, or which fulfill needed requirements, rather than choosing them to try to run up the count of AP courses.