Re: Whats your preference, rollers, carpeted boards or both?
the question specifically is for a 15' tinnie. But topic drift starts after about 4 posts here.
The question is also non specific about fresh or salt water, which can be important.
As someone pointed out, "rollers" can be keel rollers, roller bunks, or wobbles--or combinations
Some hulls cannot take rollers on the hull and require board bunks; some hulls require all weight on the keel rollers with short board bunks for stability.
One of my favorite rigs was a tilt roller trailer with a power winch. Next is tilt roller trailer and my teen-age strength on a hand winch. These for a 16 tin bowrider. Axles and my feet never got wet once.
I love my keel roller/tilt on my 13' whaler. I have wobble rollers and power winch on a 17 and a 21 (both fiberglass) and I love those rigs, esp. on the 17'. Have a drive-on with bunks for a 19' skiff that I hate; preferred its predecessor: a tilt with bunks and a power winch.