fiftystater | Easy 50 state maps for R & ggplot2 | Data Visualization library

I would like to create a map of the US showing both state and county boundaries (i.e. state boundaries in a different color). I typically do this using either shape files that I import or using ggplot2's map_data function. However, I face three obstacles.

1) I cannot install gdal and geos in my computing environment so that precludes the use of any shape files or GeoJSON files (my attempts to map county level shape files loaded using fastshp have not been successful but I'm open to any solution that can reproduce the map below but with state boundaries included).

2) I need to include Hawaii and Alaska, so that excludes the use of map_data from ggplot2.

3) I need the map to include both state AND county boundaries, which makes the use of usmap package problematic as its a wrapper function for ggplot2 but without the ease and general ability to customize to the level of a raw ggplot2 object.

4) Also, cannot make use of sf package bc it has a non R library dependency (units package depends on C library libudunits2).

What I need: A map that can project Alaska and Hawaii and display state and county boundaries using contrasting colors and I need to accomplish all this without resorting to any packages that rely on rgeos, rgdal, and/or units.

What I've tried thus far plot_usmap from the usmap package: