First week of Oct too early for whale sharks in La Paz?

[whataboutport]

I'm booked on Princess, and there is an excursion available for $189. I've also looked online and see various tour companies offering this but dates are late Oct/early Nov. I'm afraid we might be too early to see any. However, I did find one company that stated the season usually starts Oct 1, but not much of a savings since their meeting point is in La Paz and cruise ships dock a little further north, so adding in the cost of a taxi round trip. Also reading due to local govt restrictions, boat sizes are capped at around 10 anyway? Should I just purchase the cruise line excursion?