Hi, i just checked on train travel so my answer is good for that time period as well. My gparents came over from russia in 1906. they got to a p ort and took a ship over .The hardest part was to get to the ports undetected.
have heard of stories where men/boys were disguised in woman's clothes to go undetected in their travels .
alo some women dressed as men!(a rare case)
people hid in the woods if russian were seen ,sometimes they were caught and had to fight them off.
There were some time slots when they were allowed to leave-would have to reearch which years.