well, def not ideal, as all the moisture from the drying process will be dumped into the trailer vs vented outside. You really need to either change to a vent-less unit, or come up with a viable solution for the vent. Given the location in the 4113, likely looking at a hole through the floor and a run to the lower side skirting for the vent outlet.
Otherwise, need to keep the windows open while running the dryer to keep the humidity in the unit under control, etc. Really depends on how often you are going to use it. Once a week, need to solve. 5 times a year, prob not worth messing with. Ultimately up to you.