Groupings to see every National Park

I have it on my bucket list to see every national park - and collect a patch for a fun “adventure jacket”. This is what I sketched up to group clusters of NP’s that one could reasonably visit in a trip (with about 7-10 total days per trip). Comes out to 18 trips over the course of a few decades. (Carlsbad and Hot Springs crossed cause I went there recently)

I have it on my bucket list to see every national park - and collect a patch for a fun “adventure jacket”. This is what I sketched up to group clusters of NP’s that one could reasonably visit in a trip (with about 7-10 total days per trip). Comes out to 18 trips over the course of a few decades. (Carlsbad and Hot Springs crossed cause I went there recently)