I've had Progressive since 2011 and filed my first claim last month. I had to have my windshield replaced do to damage. If every claim is handled like this, Progressive will be the leader in RV insurance.
Swagman XTC4 for four bikes. It's the best, very easy to load and unload. No bike movement or damage during use. Overbuilt. Bought mine @ Amazon but have had good luck with etrailer.