BITD people used to ride cross counry with only
paper map, no google, no cell phone, 14-28 five speed freewheels, 52-42 cranksets, etc. The
engine and mental condition of the
pilot are
much, much more important than the bike.
People have ridden 40 lb Schwinn Varsities across the country. The bike the OP is considering using is
light years better than one of those. The optimal approach would be to have a custom touring bike with all the latest touring gear...but for 10% of the cost, I think that Schwinn Voyageur would be at least 80% of the performance, and an order of magnitude (at least) of the value.
Be audacious. Plan on a short tour ASAP. You're getting close to analysis paralysis.
Somehow
this old thing got me down the California Coast BITD, even though I tour on much better kit nowadays.
.