The car that hit you will be liable and if they don't have enough coverage your uninsured motorist insurance (if you have that option) should cover the difference. Should be pretty easy getting everything replaced but you probably won't be able to keep the boat/trailer to sell for parts if they total it.
Did you have any independent insurance on the boat?
I am interested in the remains of your trashed Laser and trailer. Unfortunately I cannot get my computer to download the pictures. I have rebuilt and restored over 70 Lasers in the past. I enjoy the challenge of rebuilding. If you could give my email address to your insurance company I would appreciate it. Also if you need to replace the boat, I have a 1999 and a 1996 ready to go. Thanks. Stu Nickerson. firstname.lastname@example.org