As far as using a portable generator at home, a transfer switch is the only safe way and is required by the National Electrical Code. It isolates the generator from the utility. Hence, no feedback. I use a 4400 watt generator with a 6 circuit power transfer kit made by Reliance Electric. This system has served me well during numerous power outages. I have used the same generator to power my previous TT during some outages. I did disconnect my cable from the shore power with the trailer.
2013 Ford F250 SD 6.7L
2014 Wildwood Heritage Glen 282RK
Certified Rumble Strip Tester