While I agree with talk to a professional....
Unless you can tie your travels to the business, you are really looking at a standard home office deduction which as someone mentioned, is tough if you can't establish a dedicated office space.
Fuel, oil changes, campground fees are going to be a tough sell to the IRS. What you need is evidence that the travel is business related. If you traveled to various "button" conventions and had a booth at said conventions, then you could claim you were traveling to the convention and the cost to do so (within reasonable limits) is deductible.
Example: We travel nearly full time (both RV and internationally). The DW is a travel agent, so her portion of the trips can legitimately be labeled as a business expense in order to familiarize herself with various destinations. We don't do it for tax purposes but we tend to discuss if a destination if viable for a group and how we would set it up. Then she sends individuals and groups to those destinations, so we can support that the travel relates to business.
Can you relate how your RV travel relates to creating or continuing your business, beyond just getting a tax deduction?
