Considering going on very first cruise to Alaska and booking through VanGuard Tours and
Cruises. Presentation was great. To good to be true? Anyone ever use VanGuard for and cruise?

I too was at a presentation of a Cruise/tour in Alaska, and it is very tempting to sign up. I have been waiting for a reply to your question. It would be good to know if anyone had a good/bad experience with VanGuard

To bcg and svs, welcome to cruise-chat;
I see there has been no response to your first post almost a month ago; considering the number or experienced travelers on this site I would take that as a red flag. Every business has to start somewhere, and VanGuard may have a very good product; but when you get zero response from a group like this I would say why take a chance. There are plenty of good providers out there with track records that can be verified.
Remember the old adage, "if something seems too good to be true, it probable is!"