bunk length and width? Upgrading trailer

Hey all:
I just bought parts to convert my roller trailer to a bunk support system.
What is the ideal length and width of supports. and what is the ideal placement?
2x4? 2x6?
8'? 6'?
I'd like them to conform to the hull shape as much as possible. The l-brackets pivot somewhat on the bolts, so the angle will take care of itself.
Thanks,
Carlos
I just bought parts to convert my roller trailer to a bunk support system.
What is the ideal length and width of supports. and what is the ideal placement?
2x4? 2x6?
8'? 6'?
I'd like them to conform to the hull shape as much as possible. The l-brackets pivot somewhat on the bolts, so the angle will take care of itself.
Thanks,
Carlos