It's almost always best, if you'd like to get a trip together, to announce up front the date, time, and meeting location. Trying to get consensus will just delay the announcement and result in a long thread. There will always be some folks who can attend and some who can't... and announcing the date/time/location up front gives folks more time to check their calendar and see whether they can make it.
In other words, "Hey folks, I will be at stream X on X day at X time at the such and such parking lot. Come on out and join me for some fishing."
Once you have announced the date/time/location for the get-together, I will modify the thread title line to reflect this info.
Thanks,
Dave