It is a lovely trip both down the river, across the Bar and up the Juan de Fuca. With lovely places to stop like Astoria, Victoria and Port Townsend and you have bought the perfect boat for the areas
You need to make sure you know the tides on both the Bar and the Juan de Fuca. I found the Canadian tables for the Juan de Fuca better than the US ones.
Canadian Tide and Current Tables V5 2011: Juan de Fuca Strait and Strait of Georgia $6.44 (800) 596-7245
Persistence with a google search should find you suitable guide books that give advise on the trip.
You can easily find yourself going backwards on both the Bar and the Juan de Fuca.
This is not a benign trip so you need decent guides, charts and skipper and crew with some experience. It is also a 'weather window trip' because in bad weather this is a seriously dangerous area.