I have an Cummins' Onan 4500. It weighs 106 pounds dry. Add 4 gallons of fuel and oil and it's even more. And, I have 2 of them for full 50 amp service.
I carry mine inside the camper. We've removed the kitchen table and chairs and use that space for everything else, except eating at. When traveling, the generators are put in the middle of the floor as far forward as possible. When parked, they are put on that slide out. They are out of the way.
When we need them, I carry a ramp and can get them inside and outside the camper door alone, without assistance. When they are running, they are under the King Pin area and I use the same cord I plug into shore power with. It's long enough to reach from the end to the front of the camper.
I've shared my method before and got jumped on for traveling and keeping the generators inside the living area by folks on these forums. But, never has there been a gas smell. Never has there been an oil leak or smell. Never has there been a carbon burning (exhaust smoke smell) inside the camper when they are stored there.
Depending on where we are camped, I sometimes just leave them outside under the King Pin area, but that is rare. (again, it depends on where we are camped).
I can carry both in the bed of my truck. One on each side nearest the tail gate. There is sufficient room to travel with them there, and being under the trailer and with the tail gate locked, it would be pretty hard for theft to happen. But, I just feel better knowing they are completely out-of-sight. That's why they are inside the camper.
Here's how I get them in and out....
