Wow! I haven't been on this site in ages - thought I'd take a look to see what was going on and spotted this thread.
Werner - just a couple of observations/hints.
I live in Orlando (close to the airport) and am the British representative/spokesperson for Turn 10 Sebring. It sounds like there could be a reasonably stout contingent of European attendees at next years race and if that is the case, 1) welcome and 2) here's some stuff that may be helpful.
If you would like to order your Super-tickets and have them delivered to my home address (as several others do) and save yourself the hassle of collecting them at will-call, that would be fine by me. I can hand them over the day you arrive.
The Quality Inn hotel is truly horrible - you really should re-think that choice. Paul Wooly Maher stayed there a couple of years ago and will testify to it's nastiness.
La Quinta is a little (not much) better, but has the benefit of having The Fish on Fire Smokehouse and Grill in the parking lot. For some visitors this is a major deciding factor.
I'm guessing that your RV Company is Road Bear on Narcoossee Rd. I haven't used them before, but they look like a good option.
Tuesday afternoon/evening in the staging area outside of the track is lively, with a significant number of RVs, travel trailers and other contraptions all lined-up waiting to get in as soon as the gate opens at 6.00am Weds.
North Paddock RV parking is good because it's on concrete and it's a lot quieter at night (if that's what you want), but the real party is in Green Park, for which you need a General RV pass. Bear in mind that once you are in, unless you park-up right next to a paved road, you will invariably be blocked in until Sunday morning. There are no electric, or water hook-ups and you can't get your black tank emptied in Green Park - you'd have to drive out to do that. Careful management of your RV toilet is important, assuming you don't want to be sleeping in a sewer-like environment.
A lot of the CA/DfH/Brethren folks camp in or close to Turn 10. It's a great spot with a hugely friendly bunch of people. If you choose to camp in T10 you will definitely be blocked-in.
You will need to be off the property by around noon on the Sunday after the race - when do you need to return your RV? You can park-up free of charge in any Walmart parking lot on Sunday night if needs be.
Turn 10 Core team has a planning meeting in late Jan, during which, we (attempt to) figure out what the hell is likely to happen for the forthcoming race week - if there is a big enough group planning to invade, we'll need to be aware, so that we can accommodate you all.
Let me know if you'd like me to receive your race tix.
Best wishes to all.