fietsbob

western Ireland and the Oregon coast are similar, in that if you wait out a storm
its a day, rather than an hour or 2 ..

I did like the Independent Hostels in Ireland , there you can stay in for foul weather ,
and go back to camping again, when the heavy storms pass ..

but the roads may not dry out so then mudguards are always useful..

YMMV of course ..

but the big canvas saddle bag plus a good sized handlebar bag
will let you use any bike you wish .. a traditional bit of kit.