Fishhound,
I live in Creston and have pulled my 19foot hewescraft to the Island 3 times now in the last 5 years, and were going again this July. If you can get a couple buddies or family to go and split the costs, the trip isn't expensive at all. It costs us approximatley $2300-2500 total for 8-9 days fishing staying at a campground, so basically $100/day/person. I find it really rewarding to do it myself. I don't post on here alot but in the last 3 years i've pretty much read everything I can from this site about fishing the island and we have had decent success using the 5 or 6 standard setups that are always mentioned again and again on this site for salmon. Our goal is just to have a great time, catch a large variety of fish, and cook some great meals. We havn't specifically targeted large springs, though we do get up early and fish hard. We have generally fished the standard locations within 10-12 miles of Port Hardy, though we have gone farther on really calm days for Hali. Our largest spring so far has been 28.5lb. Having a smaller/lighter boat has limited where we can go at times. Good judgement regarding weather conditions and limitations of a smaller boat is more important than chasing rumors of big fish or trying to go where the guides are fishing, and potentially making a bad choice regarding weather/saftey. We let the weather dictate our plans for the day.
If you expect a 30+lb fish on the first trip, one might be dissapointed. Managing expectations while trying to achieve a goal can definately make for a more enjoyable trip, and eventually you'll get a chance at a big fish. If you want more info about Hardy i'd be happy to help.