I do not have this rig but you may find m comments helpful.
Airbags: My trailer pin weight is 2800lbs. Our ‘16 RAM 3500 DRW rear end sagged a bit. I wanted a passive system to level and Timbrens did the trick.
Access w/slides enclosed: Our trailer is similar. We open the slide about a foot to gain access to the fridge. Same for the bedroom. Thank goodness they left access to the bathroom ;-)
2016 RAM 3500 DRW 4x4 LB LoneStar Edition, w/Timbrens, Andersen Ultimate 2, Swift Hitch SH04 WiFi Backup/Rear View Camera
2018 Chaparral 360IBL w/TST-507 TPMS, Furrion Wireless Observation System, Progressive EMS-HW50C
2006 RAM 3500 DRW LoneStar Edition
2011 Starcraft 392BHU w/Andersen No-Sway hitch