looks like my 30' Scarab might be too small to document but might be close

Yeah......that sounds about right!!! I was late!

I have seen some documented 272 Baja's. So, you should be ok.

Sounds good ,, Thank You

The CG has a special formula but I've seen boats as small as 26' documented.

For a world traveling boat, there are many advantages of documenting a boat for clearing customs. Typically for performance boats it is not really a necessity for ease of clearing customs etc.. Banks like to require owners to document boats because then you have what is called a preferred mortgage and that keeps the bank in 1st place as far as ownership goes. Plus if you don't pay the mortgage and take the boat out of country it is easier for the bank to get the boat back.
One needs to look closely at the state laws for which they live and will primarily operate the boat. The state laws will take preference when it comes to taxes to include state sales tax and annual licensing taxes sometimes called excise tax. The stories abound on this issue but bottom line research the laws in detail. For every state has different laws and they really want your money in this economy.

P.S. You can document a boat yourself for about $200 or have a marine title company do it for you for about $500.