desmodromic,
Well, taking a lot of tools probably won't do you much good, like if you get a flat. You have to remove the wheel and break the tire bead and squeeze a tube in there and somehow pump it up, all on the side of the road, so I would just have it towed to a shop.
Check your insurance before you leave and have roadside assistance and towing included in the policy.
A lot can break on the motorcycle and you can keep going until you encounter some help. If the charging system fails, disconnect your headlight and unplug the regulator and you can ride all day on the battery, if you have one, that is if you have some way of determining that the charging system has failed before the battery dies. If you do not have a battery on your PMA setup, I would suggest that you install one for the trip.
Spare oil filters? I don't think so. Not if you mean the stock oil screen. You can rinse those out in the bathroom at the motel.
Spare clutch cable? Maybe. If you are going to take one with you, then snake it under the gas tank along side the one that's there, or better yet, change it before you go and keep the old one as the spare. Leave it in place. Just tie wrap it to the new one. Whatever tools you use to install the new cable, take those with you.
You should have a two or three day buffer between when you do the last minute work on the bike and the day that you leave. Ride at least 100 miles locally during those three days. Don't do anything major just before you leave.
Now, the big question....did you install a new chain? If not, I would suggest that you do. With the miles you will be putting on, the chain will be really stressed. I would suggest a new "O" ring chain to minimize the need to lube it. The down side to a new chain just before a long ride is the stretch. Buy a top quality "O" ring chain and ride it at least 100 miles for the initial stretch and adjustment. Do that 3 days before you leave.