Zeno, I too was worried about the noise level from the gennie of our RV since we were needing it to run to keep the coach cool for my son's medical needs. If it is a newer rig, the gennies are relatively quieter than some of the older ones.
Because it is already in a compartment with a vent, it is quieter than a free standing unit. Still somewhat noisy, I wouldn't let someone pitch a tent right next to it. Depending on your camp layout, park a car next to that side of the RV, leave room to service it if needed. With extended use, keep an eye on the fuel level in the main tank. You might want to bring some extra fuel, depending on how long you plan to use the gennie. I used ours about 4 hours per day for 5 days, barely put a dent in the fuel tank.
If both of you are new to RV's, make sure one of you knows about the necessary precautions, procedures, switches... and how to read the light indicators on the panels that relate to levels of the grey, black and water tanks.
Have an awesome time at the burn.