Charles, I would suggest posting your phone number out on a public forum is an open invitation to abuse by unwanted scammers.
Posting phone numbers, email addresses and any other contact info is a fantastic way for scammers to get enough info to steal your ID.
This forum does have a Private Messaging (PM) system in which your personal info is not revealed if someone contacts you directly.
As far as extended warranties, for the most part it is nothing more than an insurance policy. The dealer sells this policy in the hopes that you never, ever show up again for warranty work past the manufacturers provided warranty period. If you never show up then they made pure profit doing nothing.
The problem with these dealer warranty addons is the warranty companies often go out of business BEFORE you need it or the fine print excludes your repairs and or they decide you failed to properly maintain something which caused a failure. These addon warranties are not from the RV manufacturer, they are what is known as "third parties".
Find out if the warranty is only good at the dealer you bought it at and how the reimbursement is done if you need warranty work done at a different dealer (if you are out of state and something breaks and the warranty is good only at your dealer then you pay out of pocket for repair then have to fight with the warranty company to get money back).
READ ALL the fine print BEFORE SIGNING OR HANDING OVER ANY MONEY. KNOW and understand the details to the "T" of all conditions and terms.
Ask for and look up the actual warranty company, read the reviews.