How small is the boat? Could you get away with a Tacoma 4x4?
Just an opinion, but if I just needed a pickup for very light duties I'd go with a V6 Tacoma 4x4.
Just my $0.02...you'd be a bit smaller and more nimble than the 1/2 tons, and get slightly better economy (not much, but slightly). If you are ever into exploring mountain roads or forest trails, the smaller size and softer suspension could come in handy and speaking only for myself, I've had great luck with Toyotas (previously owned 91 Land Cruiser, 97 4Runner, 02 Land Cruiser).
Admittedly, would have to be a pretty light boat though :W