Looking for a Generator

I am interested in purchasing a portable generator that I can use at home & RVing. Honda seems to be the top seller, but also seems to have a very high price. There seems to be several competitors that have lower prices and offer the same or comparable noise levels. I've also noticed most of the generators sold at Harbor Freight have a pigtail 30 amp plug. Are these compatible to use for Travel Trailers, and are adapters available. Thanks in advance for feedback.