Mike Schumann wrote:
Does anyone have any suggestions for the best (safest) VFR route from Mpls
to Seatle?

--
Mike Schumann

You can follow I-90 - it's a fairly well traveled route. During the
fire season you may need to deviate around fire-related TFRs, and if
you're flying a low power plane (like a J3 with a C65) it will take
some time to get up to altitude, but I don't think it will be a
problem.

For other alternatives go to supercub.org and search there; this is a
topic that's been addressed there more than once.