You are not the lone ranger. The first time I went to look to buy an RV I found then aloof, unaware and uneducated on RV's. Many not even wanting to go out on the lot to open one up to look at at. :R
I have the same advice as above, sadly you DO have to keep looking for a dealership that really cares and want to assist you in buying an RV.
...One kind of screwed us over by shot gunning our credit app out costing us many hits so now were debating on just waiting so that'll clear....
As far as this goes, as you have now learned, is NEVER fill out a credit app until you are positive you want the RV and know you can afford it. Many want you to fill out one 'just' to see if you are financially capable of buying one. THOSE are the lazy sales people fearful of wasting one moment of their time showing you RV's. And/OR won't show you ones of better quality and lower price! :W