I am not sure where your dryer is. Ours is in the bedroom closet (2016 Voltage 3970). Ours is vented to the outside just above the dryer, maybe even with the dryer exhaust. We clean the vent by compressed air. (we maintain a pancake compressor capable of 150 psi and a 50 foot compressor hose in the generator compartment in front of the battery) Now to your main question. I would vent it as close to the dryer as possible, simply to make cleaning it easier. Ours was done at the dealership as we ordered and had them install the washer and dryer before we picked it up. Use the compressed air from the inside out through the screen port, so all the lint goes out. I started to do it from the outside in and one blast of air convinced me I did not want all that inside the RV.
Ken and Sherrie Pesce