Got this and installed it yesterday on my 31ft travel trailer. Was hoping there was something in the instructions on how to install on a non-walkable trailer but there isn't Here is what I can share with you if you have one like mine and are thinking about getting this.First, it tells you that this is not a one person job. It can be but it must be VERY still. If you have anything that is a breeze, don't try without at least 4 people. This thing is big and will turn into a sail. When you first unroll this, it will unroll to the length of the trailer. There is a tag that identifies the front. I recommend starting from the driver side (left when facing forward. Unroll the length then spread away from the trailer.There are multiple straps and buckles that are designed to go under the trailer. You can use these to lift the cover over. I started from the back and added straps to provide additional length. The tie down points are designed to hold it down, not drag it, so avoid pulling hard as the anchors will rip out.Its a tough contest to get it up there at first because of the weight. Pull it about half way and anchor as you work from front to back to get it up and over. Have a long pole available to lift over skylights, the AC and vents. I worked it over a couple of feet, anchored and moved to the next point. Once it gets completely over, then it can be pulled to finish it off. Get the two sides, front and back to hang about equal distance. I left the door open when covering so the chance of mold is limited.Once you have it over, put the straps underneath. The front and back have flaps for side to side tie cinching. Finally, there are two long straps that encompass the whole trailer that pull through the loops at the bottom.It took me about two hours to do this by myself. I was very lucky having a no wind day. With more people, it would be significantly easierAfter it is on for a while, will comment back about its durability.