Jeff and Julie,
I concur with the idea of hitting either Sekiu or Neah Bay and would recommend Neah Bay over Sekiu if you're planning to stay for any length of time. Neah has much better moorage with a very protective double break water in front of the marina and concrete floats with cleats and electricity. Most spots are Sekiu are not that well protected and the floats at most outfits are terrible. I can easily sleep on the boat in bad weather at Neah Bay. It's sometimes hard to even eat or cook on the boat while moored in Sekiu. If I moor in Sekiu, I sleep in a tent.
Also at Neah Bay in area 4, you're allowed 10 rockfish/day/person where as the limit is one/day in area 5 (Sekiu). Even if the salmon are sparse, when the weather is good, you can go out south of Tatoosh and, with a little hunting, find good schools of black rock cod in the 3-5 lb range. When you do get on a school, they will hit almost anything with hooks on it and the action can be very fast. They key to fishing for them is to cruise around over structure with the fish finder until you find a good school and then set up a drift that will take you through or keep you on the school. Have all hands ready to drop their lures when you get over a school. Then pull 'em in as fast as you can, through them at your feet in the cockpit and drop the lines again. On a calm day with a big school below, you can often do this 3-4 times before you get off of the school. Then cruise around a bit until you find that same school (or another) and repeat. It's loads of fun and it's not unusual to pick up 10 fish in a 5-10 min drift if you get things just right.
As for weather and waves - it's highly variable but generally the swells and waves inside the straight are OK in July/august. However, I have been in 8-10 foot long period swells with 2-3' of chop on top even at Sekiu. If the swells are long period and there isn't much wind, it's just an annoyance (and sea sickness inducer). However, in that west end of the straights the weather can get very nasty quick. Generally, the 22' CD will handle more waves/swells/weather than the captain can and after a few times of boating out there you'll get used to operating in swells that you might find scary at first. Long period swells are really not much of an issue but the first time you are in swells that are taller than your boat, it can be a bit disconcerting. I always look at the
Swell Watch NW site prior to going out along the coast. It has a model that predict size and direction of swells for a week from the day and it's prety accurate (at least for the first few days). Last year when I was out at Neah Bay for 9 days, I had the people I was taking out each day printout a copy of the Swell water data for 2-3 days and ring it with them. This year, I'll probably set up my cel phone for internet access when I'm there (BTW - you get great Verizon service at Neah Bay and upto 15-20 miles off shore - no other service provider had decent coverage out there last year). When the weather isn't that good, you can generally still catch silver salmon just off of Waddah island and be in a position to quickly get in behind the breakwater if the weather kicks up.
The other major issue out there is operating in thick fog which can come in at any time of day. If you have a radar and a good GPS, it's really not much of an issue. If it's not too thick (1/4 mile-1/2mile visibility), a GPS is sufficient.