Thank you all for the advice and comments. The gate has been installed. It was a big project, not the installation itself- that was the icing on the cake. The real work was choosing and coordinating distribution of keys to the 62 members of the association, the local fire department, the Bureau of Public Lands, and providing a system for service persons (propane deliveries, real estate agents) tempoary access without compromising the member's security. How I did this was having the gate "double pinned" where either one
or the other lock opens the gate. The lot owners have keys to one lock and temporary access uses the other lock. Why? Quality locks and keys are expensive, so should some temporary keys not be returned, replacing that lock and key set is less expensive than issuing new keys to all the lot owners. We used Medeco locks and keys. These cannot be picked, drilled, are very difficult to cut, and the key can only be copied by one locksmith in the country. FYI- 2 locks and 100 keys cost a bit over $1200. Pricey, yes, but putting locks on the gate where keys can be copies anywhere wouldn't really provide much confidence in in security.
As this area is located in one of the small Plantations, there was some push back. We hope since we constructed a bypass for atv, snowsled, foot, horse traffic, everyone will come to understand the purpose of the project is to prevent the theft and vandalism, not prevent the enjoyment of the wilderness. (We maintain 22 miles of logging type roads and there is a State Lot abutting our area - (there is other access, but not as direct as over our private road). Our Association seems to be a bit different from many since the privately held land is in excess of 3000 acres so every issue is magnified and sometimes in a different class altogether. One example is when investigating insurance for the association, the cost was extreme since we, due to the miles of road and number of structures (including bridges) put us more in the category of a municipality.
I put together a 4 minute video of the final installation of the gate. You can find it on YouTube here >
http://www.youtube.com/watch?v=mBub2GLpayg
If anyone finds themselves in a similar situation I would be glad to let you know more of the process and key record keeping system.