No
I bought my O'Day 222 new in 1986 and I trailer-sailed for about 8 years in salt water. I just recently put bottom paint on my hull for the first time ever, only because I went to a flat bunk trailer. Prior to that though, I would leave my boat in the water for as long as a week and then pull it out and let it sit on the trailer at the club for a couple of days. I never really had to worry too much about Barnacles. The hull was always pretty clean, provided that I didn't leave it in the water for longer that a week at a time. If I was a little younger and still had my roller trailer, I'd still be doing this. My advice to you is; clean the hull up good and give it at least 3 coats of a good Teflon boat wax. Four coats of this wax would be even better, in fact. Bottom painting is a pain in the butt. If you can get away without having to use bottom paint, go for it.Joe