The time that I was at McMiller with family which was prior to our shoot there last summer they put us on the LE range as they had work going on with the others. It was only lightly populated that day and it was a very nice range. 100 yards is plenty for me. If they would let us reserve it for a dedicated group of a dozen it would be great. If the group ran larger than that I don't see that as much of an issue, even down to sharing a bench. We usually move around and try shooting other guns anyway and fill other time with shooting the breeze.
I like McMiller for the opportunity to bring our own picnic...grill, meat, sides and beveridges. It was pretty busy the last time, busier than I've ever seen it for the few times I've been there, but it didn't stop us from getting on to shoot.
The poll is inconclusive, not only for the small number of people who have shown any interest but also because the choices for dates are all over the place. Pick a date or dates and rock and roll. Do it by the expected weather, to avoid June weddings, graduations, baptisms, etc...whatever. I'll put it on my calendar and be there with a grill, cooler, meat and guns and hope that others can join us for a day or two of fun.