There are 2 power systems, 120VAC which runs the AirCon (w/heat strips), Battery Charger, and powers the AC outlets provided.. this requires "shore" power borrowing from marine terminology... the DC system runs of the battery, it powers the lights/radio/powervent(s) plus any 12VDC accessory & USB ports.
Torsion Axles provided dampening by design, and proper dampening depending on weight loaded out.. it will ride far better down washboarded roads than any other normal leaf spring trailer.. but given everything is solid aluminum and welded together structure, the chances of anything rattling apart are basically zero even if it did.
Let me say the heat strips suck, If your going to need heat and have power get a small 1500W Space Heater, it'll be 100x quieter and more effective... If you need heat without power, I'd suggest looking at outfitting either/or a Propex Heater (external combustion/dry/expensive) or a Wave Heater (internal combustion/humidity/cheap) depending on what you prioritize.. Really avoid Buddy Heaters, they stink and nobody feels safe sleeping w/em burning.
AirCon Requires a Generator if you need it boondocking, a Honda EU2200 will run em.