Both of us have noted the effect during our trip. We've been on this trail for 14 days but it seems much longer. We struggle to recall some event that occurred long ago... but no, it was two days ago.
Speculation to the cause? Our senses are on high alert in bear country. Our slow speed of travel allows us to take in so many more details than a person normally gets in the same amount of time. Every bit of it is new and wondrous and hard to ignore.
We will call this "the trip of a lifetime" not because it can only happen once in a lifetime but because in the 6-8 weeks we expect it to take it will generate a lifetimes worth of memories.
Time travel is real. We're doing it.