Yeah, I wasn't even thinking about the fact you are on vacation diving. I work Monday to Friday. So I can only dive on the weekend right now. September 4th is Labour Day. So I could go diving on September 4th. But if you are looking to dive all week, you'll probably find better options with Helen. If you call or email her, she might be able to hook you up with other divers who are going out that week.
If you need a buddy for September 4th, let me know what time and I'll meet you out at Helen's (or wherever).
The dive community is rather small in the Southern Ontario area. So Helen might also know dive clubs out the Kingston/Brockville area that you can connect up with. There are PADI, GUE, IANTD, SDI/TDI and probably a few other agencies represented by various dive clubs.
Also, when I went diving with Seaway Valley Divers out of Cornwall, they hired Little Diver. The boat captain was Ron. He was amazing. Don't know if he does walk ons but I'd dive with him again in a heart beat. Maybe call Seaway Valley Divers and see if they can give you the contact information for Ron.
Ron's boat holds 12 divers. So he won't go if there are only 2 divers (Helen of Abucs will) but he might have space with other groups.
