No, I will not apologize.
You walked away from your site for YEARS, and now seem in a panic. Which is exactly what was to be expected.
I did not criticize on the basis of technical knowledge, but on lack of common sense.
The post certainly implied loss of the password. I will apologize only for my lack of mind-reading ability!
How was I to know that what you meant was "one of my favorite features of iWeb is that I could update without having to type passwords?." Good news: Every WYSIWYG HTML editor has this feature, and even some of the fancy text-editors where you work directly in HTML. (But, see below, I don't really recommend this approach, as things have changed since iWeb).
I think you are being overly-sensitive. I could haul out a couple of shop-worn analogies - "shoot the messenger", "gift horse"...
It looks like a simple and nicely-designed static site. It just needs a way to keep it fresh. (And the will.)
I would suggest a CMS only if you want to maintain a blog. You may face some challenges making the whole site not look like a blog, then, though.
If there's no desire to learn HTML/CSS/JS, there are good online site generators today that have already been mentioned - WIX, SquareSpace, etc. I would recommend starting over with one of them. These did not yet exist when iWeb was created. Well, they did but they were poor.
The existing years-old content generated by iWeb is likely too out-of-date to fight with to bring it up to date.
As a quick fix, go read the instructional material on your host site, find the file where you offer bookings for 2013, download, edit in a text editor, and upload. Or hire somebody to do it. It should take them only a few minutes. Repeat for other simple changes.
Now you can accept bookings for 2017, which seems to me essential for your business.
Tell me, what do you think that prospective customers think, when they see that you are "accepting bookings for 2013"? Do you think they will contact you? Do you think that they will get an impression that you are on top of your business, or even still IN business?
THAT line jumped out on me, and was 50% responsible for the snarky reply. That and the implied loss of the password.
(My response could have been even snarkier. I really, really resisted the Rip Van Winkle analogy!)
Congrats on the New Year's Resolution, though! Now - take a deep breath - and continue with what you had set out to do! Find a solution you can live with, and set some schedule for regular review and update.