When I bought my car last Fall, we wandered around the car lot peeking in windows, etc. I went inside to find a salesperson while my DH stayed near the car we wanted to open up. I told the salesman on the way back out that if there was any pressure at all my DH would leave and not come back. Salesman said, "understood". He opened up the car, stepped back and let us sit in and look it over and only spoke to answer our questions. We test drove it, signed the papers and drove it home. In follow-up, he let us call with questions, always friendly and helpful.
Our RV shopping has been the same. Leave us alone to wander, if we have questions or want to "deal", then we will find a salesperson.