50-60 miles per day is a vacation.
100 miles per day is an accomplishment.
Just decide which one you want.

Different people prefer different roads. Some people like the broad shoulders and gentle slopes and direct lines of the main roads, and hate the close traffic and unending hills and extra distance of the small roads. Others hate the noise and constant traffic and debris-filled shoulders of the main road, and love the rural scenery and peacefulness and intimacy and quaint towns of the small roads. I think more people are in the second category (including me), but the first category has its devotees.