I've got the same unit, just haven't got the trailer to install it yet. After talking with a few people that have one, they do get warm but not extremely hot. Some have added small pieces of wood under the unit and mounting it to the wood to get air flow around it. I'm probably not going to worry about it. Also, there should be no reason to access it at all (the main reason I opted for the remote unit...mine is going behind a screwed access panel between my furnace and converter) after installation unless something fries in it.
2012 Chevy Tahoe LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition