I went to the 2012 OSP and had a great time except for a little wild fire smoke. I hope to be there for 2017. I have been going to the GSSP since 2008 which is much closer to Reno. I am fortunate to be within a reasonable drive of 2 great star party events.
Things I like better about the OSP:
You can come early and stay later to make it a very long star party.
There is more darkness in August and some of the fall/winter objects are available in the pre dawn morning darkness.
There seem to be more daytime astronomy related presentations available to attend.
There are no visible lights from any communities.
Things I like better about the GSSP:
The shower truck is included in the price.
The dinners are well attended and people can sit at a central shaded location.
It is much closer to my home in Reno.
It's a shorter drive to buy resupplies, gas or to go out eat.
The community and family that owns the ranch are very friendly and seem to be glad we show up every year.
Many years I go on long backpacking trips in August so the GSSP in late June/early July doesn't conflict compared to the OSP.
Edited by JMW, 25 June 2016 - 02:48 PM.