For my next TT (if bought from RV dealer), I would ensure they include a slide awning as well. IMO, a slide awning (to reduce stuff on slide top and to reduce flat roof water leaks) is mandatory. Without an slopped awning, a slide roof looks like: http://i178.photobucket.com/albums/w...e/100_0358.jpg
If wondering, I'm installing a slide awning this spring. Should have listened to my own inner voice - during RV price negociations... For DIY install, surf:
Also ensure the RV dealer includes MaxAir (or simular company) Vent covers over its RV roof vents. Would go with white vent over the bathroom (to ensure some light comes in) and ensure black vent is used over the bedroom areas. re: http://www.pplmotorhomes.com/parts/rv-vents/31-1919.htm
Would include a Surge Protector as well. Currently, I have a Surge Guard "hard wired" unit and it works great. re: http://i178.photobucket.com/albums/w...e/100_2042.jpg
Note: Some folks like the Progressive Surge Protection with Power MGMT display much better. Its more expensive and if I had the extra dollars, I would have bought it instead. re: http://www.progressiveindustries.net/ems_lchw30.htm
Note: Power at many camp grounds is dirty. The risk of electrical problems at a CG is much higher then a stick house outlet. Especially your own home's outlet. IMO, Surge Protection (even basic protection) is mandatory.
Do investigate the bedroom windows. Especially your kid's bedroom windows. If your kids don't like light and love to sleep in, get their window tinted as well. I had to manually tint the one bedroom windows myself. Cost me $20 but known today, I would have gotten my RV dealer to include this option.
If you go on your roof for cleaning, ensure the RV dealer includes an AC cover. While "on the roof" preparing for outside winter storage, simply put the AC cover over your RV's AC unit. Especially if you live in snow region - like my TTs. My previous TT had an AC cover and wished my dealer included an AC cover - for my current Jayco. One of these days, I need to buy an RV cover for my current Jayco.
If your TT is longer then 22 ft, get 2 x extra scissor jacks as well. These jacks are same size as the end scirros jacks, and can be mounted within the center of the trailer's frame rails. Thus, reducing (eliminating) floor's uip/down bounce. Especially for heavy weight people - like me. My 29ft Jayco has center jacks "now" and they work great. For picture of these jacks on a different TT, surf: http://i136.photobucket.com/albums/q...ugust20071.jpg
Note: IMO, center Scissor jacks under long trailers should be minimum build.
When doing "negociations" with RV dealers, they will state that these items are NOT needed. They are "nice to have" options. Some of these items are. Yet. Some of these items are mandatory. Like Surge Protection, center scissor jacks and Slide Topper. I fell into their trap of (that's really not needed) and soon after, I had to buy many of these items myself. And, paid much more for these items. Wished I got 30% (or even 20%) off these items - with my TT as well... Lesson learned the hard way....
Hope this helps..