Camp generator rental costs?

Greetings, does anyone have direct experience with getting a generator for your camp from OSS? The topic was raised at our camp this year about a getting a genny for next year from OSS, or just buying our own (40kva or thereabouts). We're a 50 person camp, with 4 rv, 7 trailer, and 6 tents.

If you have rented one, please list the size, cost, and how many drops (some people call spider boxes I hear) you had. Any direct info or experience would be helpful, thank you.