Popular option: Bike trailer behind a road Bike , if that is the bike you cannot wait to ride the next Morning ..
BoB, 1 wheel, or Burly, 2 wheel,
https://www.biketrailershop.com/..
The MTB Will be slower , but if you tour to see the places that you are going through , no need to hurry..
people used the compact double 50-34, is a crankset cassette rear D change OK?
you can set up a 1:1 low gear with a 34t on cassette and crank.
Hundreds of cycle tourists do the coast, or end up here at the end of a west to east ride,
& even the transcontinental race from west to east were in town here , or passing through.