I drove from Phoenix AZ to Ohio to get my TT.
I saved over 10K after the trip expenses.
I only needed service once. It was on the trip home from Ohio. The dealer set me up with another dealer that was on my route. They were ready for me when I arrived with an empty bay. It was like a NASCAR pit stop. In and out in under 30 minutes.
Paying more upfront for service you may never need makes no sense.
Get the best deal you can get upfront. If you need to, you can use some of the money you saved to get fast service.
I have often gotten to the head of the line with this approach.
Whether it is a table at a restaurant, or an RV repair, or any other thing that has a wait.... It often magically disapears when you speak the universal language. Money talks. More money talks louder.
I like to say that money is power. When you are negotiating a deal,
the seller will do most anything for you as he wants what you have... Money. Once the money changes hands, the power shifts to the one who now has the money.
Always keep as much money (power) as possible as long as possible.
You can then use it later, if you need to.
On edit: Paying a dealer more upfront in the "hope" that he will then honor your warranty quicker really makes no sense with an RV.
RV problems are usually discovered while they are being used on a trip. The best way to solve that problem is at the CLOSEST dealer. Probably one that did not get any of your money from the sale... So he will be even less motivated to help you than your selling dealer .... For free. This is when keeping the power (money) in your wallet is very useful.
Think of paying more upfront for the expectation of service later as the same thing as buying an extended warranty.
