I have never had a problem with RFI from a Honda inverter generator. With other generic models, the ignition systems often create a large noise fingerprint and they suck fuel compared to an equivalent rated Honda. Also, the generic operating generator noise will become a problem over a 6 day event.
I do not think you have used many generics because Honda does not have a exclusive hold on noise level or fuel usage. They do make a quiet unit but other are nearly as quiet and unless it is right under your feet this is not a big issue. I would place generator some distance away anyway. Also I was without power for 36 hours last month and got on air for a bit using generic power and had no detectable RFI from it. Honestly if this is a big long event you are going to want more than 1 KW at times and not want to refuel it 4 or 5 times a day too as this could get very old over a weeks time. Get a generic 3K or so with a 4 gallon tank and you will fuel it every 12 hours at most and even then it will not be close to empty unless unit is heavily loaded. (so for one way you refuel about 35+ times vs a dozen at most running 24/7) Also consider if this is in summer and hot, a 3k unit will loaf even in extreme heat under a 1kw load while a 1k unit will be straining. What ever you choose do plan for a few oil changes during event and if new do break it in before event and start event with fresh oil. People that have short life with generator motor never bother to change oil every 2 or 3 days tops in 24/7 usage.
Point is we are not talking about a occasional use single or small party short term event. We are talking maybe 24/7 for 7 days and I would get a bigger unit and generic too for much less money. Also consider this, if you use several batteries to power other things at this event, a 3kw unit can run a few big chargers to rapid charge several deep cycle batteries while still powering radios and lights. Not possible with a 1k unit. Nothing is more frustrating than having a generator but then finding its capacity lacking and wishing you had bought bigger.
To be clear my use of "generic" refers to the run of the mill, contractor grade generator or the 900W, 2 Cycle engine special from someone like Harbor Freight. Honda, Yamaha and others make great inverter generators. Over a several day period, you won't appreciate the high noise levels often associated with "generic" generators. The "generic" generator often has no protective circuitry to closely regulate line voltage and frequency or things like low oil level protection.
