Do you just make an appointment and drop it off? Do they do repairs rapidly? I would be coming from out of state and would want to stick around long enough to get the work done as long as it doesnt take weeks. I have e-mailed them but
To answer your concerns..
Normally, you'd be best advised to call ahead. Since this is the winter time, the "cheaper" rates are in effect and, they just might be booked up..You never really know until you call or show up.
I've had success in just showing up..As busy as they are, the guys at the service center always seem to be able to fit you in.
As for sticking around, there's a really nice campground on the factory's site that you can stay at (full hookup). They will bring your unit back out to the site each closing of the work day. You have to be up early and, ready for them to take it in each day to do the work.
If you've never been to Jackson Center, there's the factory tour, the town is small enough to walk around for a visit or, you can go out to the interstate head south to Wally's world...lol
The last time I was there, the charge was free (campsite) as long as you're having work done on your unit. I recalled this "free charge" extended to the day before and the day after of the work period. Otherwise, it was 10$ per night..(last years rate)
Good luck on your projects~