You don't need to accept the trailer that the manufacturer is offering, most dealers sell multiple trailer brands, and will put the trailer you want under the hull you buy.
In fact, both of my Lunds were on trailers that I supplied to the hull-selling dealer. The "package deal" may save a few bucks, but it is more important to get what suits your needs.
"I've got a car with a trailer hitch, and a pocket full of money. Do you want to sell that boat today, or not?"
My Mentor, Bill Michalek, circa 1975