My 2011 Laredo was built by request with an E/W cabover. My Ram 2500 is a standard cab/long bed 4x2 and the considerations were to be as lightweight as possible, minimum cab overhang, and the fact that most of my adventures were solo.
You might consider a window boot to (mostly) eliminate the issue. Most manufacturers offer one as an accessory and they aren't necessarily make/model specific. The removable pass-through window on my Northstar Laredo did well with water before I "got...
Another approach to frost buildup is to "head it off at the pass." Warm air can enter the cabinet through the drain tube and contribute substantially to the problem. The simple solution is to extend the drain tube 8-10" with some appropriate tubing a...
This may be what you are looking for:https://www.gcioutdoor.com/directors-chairs/pico-arm-chair.htmA less pricy option that doesn't fold quite as small:https://www.gcioutdoor.com/new-products/xpress-dc.htm