Sunday wasn't bad. (I'm sure we had better weather then on Saturday.) I was surprised the blind was too close to the feeders. I wasn't able to use my 500mm lens most of the time. Still, it was a great idea. I hope they do it again.
I ended up not going Saturday due to this stupid cold/cough I can't get rid of.
When I first went in January, I brought my 600, and like you, I found out it was to much.
Probably something in the 100-400 range will be better.
I've suggested they put some seed by that pond, but they never do. So I started bringing
my own seed and placing it near the pond and up on those fence posts.
I asked them about March, but right now they're looking at May as their next opportunity.