OH PLEASE. Colorado & Washington have hardly been over run by welfare recipients, even though it is far less expensive to drive to Colorado than fly or sail to the VI.
In fact, those people visiting the VI, have a lot more spendable income for spending cash on MJ, while vacationing there.
You are kind of getting the situation backwards. MJ is not going to draw people to a vacation destination, as they already flock there. The availability of some Jamaican Weed will just enhance the visit.