In my opinion, I would really consider getting some more miles under your belt before taking on Gore.
I was a raft guide for many years, who feels confident in my paddling skills and I would feel queasy about taking on Gore...
just the thought of swimming there makes me want my mommy (Kinda kidding, kinda not)
What worries me is that you don't own your own watercraft, but instead rely solely on commercial outfitters to get you down the river.
The only reason I point that out is because that tells me that you have minimal experience depending on yourself on the river.
Ie, getting outta trouble, reading water etc.
The fact is, even if you're guide is stellar, you have to be prepared to swim and okay with that notion.
My intention here is not to tell you what you should do....I guess I just read your post and I felt I had to respond.
It would be devastating to hear that something happened to you because you didn't have all the info to make an informed decision.
P.S Gore isn't going anywhere, it will be there next year...I promise
All the best