My first trailer shed was all enclosed. Trapped heat inside the shed ruined all the vinyl/plastic/A/C shroud/vent covers/etc. Mud daubers were terrible. We moved from that place to where were at now.
This time I put up a 16' X 40' X 14' inside height pole barn that was open on both sides (40" from the ground) for south to north airflow. Daubers are thick as my big pond (mud source) is about 150' away. Air flow eliminates most of them and heat doesn't pack up inside.
My floor is just 3/4" crusher run limestone.
My double doors are side by side and 12' opening. The shed if wide enough to open the slides if we need the trailer for more beds. Or I can drag the trailer to the woods where I have 110v 30amp service pole and water. The grand kids and great grand kids like this better than staying in the trailer shed.