As has been stated in this forum many times, there is probably no single best choice. There are a number of factors which must be taken into account such as location, useage and personal preference., However there are two important factors which must be taken into account,when you are considering fulltiming.
1. Personal property. I assume your nu WA is a TT. Many people will cover their Ty under there auto policy. This covers the trailer for comp , Collision and Liability (while attached to the TV). Coverage for personal property would be extended form your stick homeowners policy with a SEPERATE DEDUCTIBLE. Full timers have no such extention.
2. Liability. The trailer is covered for liability while attached to the TV, there is no coverage when "the trailer is used as a residence". Also there is no coverage for personal liability for personal liability away from the residence.
The so called " Full timers policy add personal property and personal liability coverage for a fee. There are also other Minor benefits to be considered
Personsonally I sold and reccommended Progressive, but here are a number of good choices on the market.
I would suggest a sit down with a trusted Independent agent.
Tony