It looks to me like the responders in this thread are a microcosm of Dave's customers. Most folks don't mind/expect that they will have to pay for or do the hauling of their tractor for warranty work, while a few expect that all of the hauling should be covered under warranty. My opinion, for what it's worth, is an echo of a previous poster that suggested just keep doing what you're doing, and have sales guys emphasize that hauling for warrnty work is not included.
For those that might be scared away by the emphasis (and by no means am I picking on paulfun9 alone), I don't think that there are any brands of tractors that cover hauling under their standard warranty - I could certainly be wrong on that, but I think that's pretty standard fare. Similarly, there may be a few dealers (examples given on this thread) that either provide free or minimal charge hauling or on-site service for their customers, but they are rare in my area.
My expectation, and it was made clear to me by my dealer, is that I am on the hook for any hauling related to warranty work. Did that scare me away or affect my decision to purchase? No, because it was my level of expectation. Someone including hauling would have surprised me. I didn't have to have any warranty work done during my warranty period, so it was not an issue. I did have to have a fairly major yet simple (?) repair done several years ago - had to split the tractor to replace a small part on the shuttle shift mechanism, and when I called the dealer to arrange pickup, I expected to pay for travel both ways (and it's about 70 miles - one way). However, they were delivering a new tractor very near to me and if I could wait a day (just one day, in this case, good luck) then they would haul it to the shop for free.
I still paid the return trip, however when my repaired tractor came back, not only had it been repaired as promised, and quickly (it was picked up on a Monday and returned the following Friday), but they had also replaced the seat, which was in horrible condition, with a seat that had a minor imperfection that they had to take off of a new tractor and replace (it looked like new to me) at no cost. Additionally, since the guy that comes once a week to clean all of their tractors was there while mine was sitting on the lot, it got cleaned as well, and looked better than it had in years.
Having said all that, I still would have been satisfied if I had to pay the hauling both ways and only got the repair done, but the dealer exceeded my expectations and doing so ensures my repeat business and I make every effort to send other business his way as well. I'm sure that there are also many other dealers that are this good to work with, across all brands - I'm just really glad that mine is as good as he is.
Good luck and take care.