Training camps for amateur athletes are becoming common place now. It's easier than ever to get away for a week with your bike. Especially with companies like Race Force who take the pain out of watching your bike box get launched onto a plane at high speed, you can rest easy.
Thanks to apps like strava with it's course creator popularity setting and incredible mapping technology like a Garmin Edge 1000 you can turn up to a brand new area and ride with the confidence of a local.
The only thing you might want to consider is the impact of riding 5 hours a day for 7 days in a row. Weekend warriors might want to throw in some heroics and set their biggest ever weekly mileage or top the climbing leaderboard of their strava virtual club. But if you arrive home exhausted and it takes two weeks to recover, are you actually any fitter for it?
Check out this detailed explanation from Lynda Wallenfels. In layman's terms, the goal of a training camp is to increase your long term training load without making it so difficult to recover from that you go back to square one.
Dropping your TSB below -70 during a training camp is reasonable and going below -90 is not recommended. If you go too deep on TSB it will take too long post-camp to bring it back up to positive.