Being full-timers make it complicated. I used my RV almost exclusively for work related travel (to save on hotel cost, or to have a "home" while in places too remote to stay in a hotel). Everything I did in the RV was for work, so this was easy to assess for tax purposes.
Because your Rv is your home, then you would live in it 365 anyway, so what days are left to write off anything there? None I imagine. But travel is travel, and you can write off cents per mile, or in a bad-mpg RV maybe write off actual gas expense and calculate other cost based on miles according to irs tax code. I was better writing off miles than actual cost.
From the time you leave to go to that far-off work location to the time you get back there are things you can write off like meals, and that amt varies depending on where you are in the country, or parking fees (maybe campgrounds, since you likely are paying rent back home too), tolls, convention ticket prices, supplies for work, or things you know more about than us.
To the guy that wrote off every expense.... That works until you get an audit, then you might be sorry. I tend to error on the side.favor/benefit of the irs, not on my side when in doubt about any write-off. Many things I could write off I do not because Im scared of those people.
I drive 30,000 miles per year for work, so that is a huge write off by itself, so I don't need to go looking for iffy write-offs. Get an accountant .
