Re: trailer size
You need to know the weight of the boat, when loaded with everything except people. Now, you need to know the weight capacity of the trailer.
Size is second.
GOOD EXAMPLE:
My buddy and I have similar boats in size and our trailers are both made by Heritage. Mine is rated for 5100# and his is rated less. (My boat weighs more.)
So, even though my boat could, in theory, fit on his trailer, it would not be legal or safe

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If the weight checks out, you may need nothing more than to move a couple bunks and adjust the winch stand

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Just my take on it.