We are planning on going full time for awhile. I wanted to be able to use the bumper shelf to carry bikes and probably a generator. The factory shelf supports were less than adequate. They were already bending with not ever being used. I went to Buckley Welding (Washington State) and they did a FANTASTIC job!
http://buckleyweldingservices.com/ Photo 1 shows before, photos 2 to 4 show after. Less than $170 for time and materials.
I moved the spare under the trailer on a BAL carrier.
With the mesh I can secure the bikes and generator.
When I sat my 220# person on the bumper edge it did not even sag or move a bit!
I am impressed.
GrandBob