What are you towing with? We keep a generator in the truck bed and by directing the exhaust away from the sides can run it in the bed. It has a box that slides over the top to keep it out of sight and out of the weather....it's about 12yr old and I do need to do a little rebuild as it's plywood and the bottom is starting to rot.
1) Is your trailer hitch actually frame mounted and solid?
2) I would get nervous with a 100lb generator plus another 100lb of gas...that's a lot of weight and the back of a trailer can move around quite a bit on rough roads.
3) A cable lock is a reasonable solution. It will deter most potential thefts but not all.
4) Most people aren't over sensitive to generator noise...especially since most only run them longer time frames if they have the air/con running...which makes plenty of noise.
