3 days is very reasonable in a Cub on 8:50's with standard
prop (74/56) to Seattle. Cruise should be around 105 ish. Trouble is everyone nowadays is...
I did notice that the Carbon Cub that took it ALL last fall at the National Seaplane Convention in Greenville was sporting a big long Catto ? No one...
If you have ANY intentions of ever flying skis, or flying off airports with big tires, for gosh sakes don't forget to "box the tail" (or X brace) it...