imho, It would be better to keep all things Sketchcrawl in one place. The simpler the better - for us and for you, to keep things tidy
Just my 2 cents of course ... I guess opening a second " spot" would be redundant, as you mentioned. I know I wouldn't visit two sites.
I wouldn't mind joining a list to get a mail, say, one month in advance, and a reminder the very weekend before the event. If it's well presented, nice images, etc, somehow catchy ( you can do that
, I guess people might just be keen to forward that their own friends and spread the word.