If you're serious about going, book a ferry now on the Steam Packet website. Pay the deposit and the balance is due in February. What I've done in the past is book ANY crossing then after the end of February adjust the timings online to suit when I want to go. The problem is that thousands book their crossings in June and when the balance is due in February loads drop out and these bookings go back out on sale. Of course you could simply wait until March and take your chances. Security wise, the TT is probably the safest place to leave you bike. I've never bothered with security. Accommodation is expensive but I've used homestay the last two times I've been. Camping is an option but as in the case of 2012, you could get flooded out. If you do choose to camp what a lot of people do is mail their camping gear over beforehand and post it back afterwards, saves on carrying loads of stuff on your bike. The TT forum I posted earlier in the thread has people advertising accommodation. The official TT website also has a list of accommodation and campsites: http://www.iomtt.com" onclick="window.open(this.href);return false; Then there's the question of when to go. I've done practice week and thoroughly enjoyed myself. The roads are quieter and there tends to be less nutcases on the island compared with race week. Saying that, I've also done race week, the atmosphere is electric on the island and of course seeing the races live is awesome. Or do both weeks. With regards to riding the course, the mountain section is one way during the fortnight and has no speed limit. There are some short sections elsewhere that are the same but most of the course is speed restricted. Stick to the limits in these sections, if you're caught the police WILL throw the book at you. Don't restrict yourself to the TT circuit though there are some beautiful places elsewhere on the island to visit and some of the roads in the south of the island are excellent (such as the S100 course). It's an expensive trip but is worth it? Damn straight it is! Here's a video I made of my last visit there in 2014: https://www.youtube.com/watch?v=DhRq78Wnhjg