Hi G8orwayne,
I'd expect your rig has Dexter self-adjusting brakes.
But if it's been sitting for 2 years, you should carefully inspect the tires for minor cracks or other indications that they might not be up to the trip. If they're Towmaster/Towmax, you should replace them before leaving. If your wheels are rated for 110 psi / 3750 lbs (check inside of rims) Sailun S637 or Goodyear G614 tires would be a good choice.
You might also want to have the bearings repacked. The grease may have deteriorated while sitting.