Surely, you have more than enough material from your trip from Hastings to the Gulf of Mexico.  You can give the trip report from the headwaters to Hastings the next year.  In your second report you could compare the two trips and repeat some of your first report.  Not everyone in the group in 2023 will have attended your 2022 report.  Additionally, the old adage of a bird in hand is worth two in the bush.  No telling what can happen from now until spring of 2023.  You may have told us before, but are you retired or do you have a really understanding employer?