eVERYTHING 4X4 FOREVER AND SARDOT SAID, plus an oil filter. I see you're in So Cal, as am I. The Barstow and Nevada bases are draining fluids by punching holes in the tranny pan, fuel tank, and removing the diff covers-(and not replacing the bolts), and they drain the t-case.
so bring those fluids, the oil filter, bolts and gaskets witha scraper for the diffs, I used rtv silicone and bolts to temporarily plug the tranny pan and fuel tank, bring 5 gallons of fuel to add. They drain fluids for transportation reasons.
Download the TMs, and either print them out, or at least get familiar with them before you go pick up th oh9. (No offense, but do not shortcut the learning and research, b/c other than SS, hardly anyone knows these things)
My build thread shows photos of my tranny pan and what not. We welded drain plugs into the tranny pan and fuel tank once we got it to the shop. I recommend that for obvious draining issues, especially b/c I think we all know someone who's freind, gf, or wife accidentally put gas in the tank. The base torched a big hole in the fuel tank skid plate, so we made a skid plate that bolts to the skid plate- follow? That we if i need to drain it, i remove the access skid plate, then the drain bolt.
Hopefully you don't have these problems, but if you do, I hope this helps.
Good luck and give us pics!
Also, I recently posted a quick-look-at-overview on FAQs that is like 27 pages and covers most of the FAQ stuff, but i organized it for SS. "i figured everyone could copy it, add to it, then repaste) I'd print that out and take with you, because if you need parts or troubleshooting, it covers the basics.
Anyways, Good luck again!
-Dave