Note that the official toyota transfer case fluid is about $120 just for the fluid for your truck. Given that, if they actually use that and the toyota diff fluid, the value service isn't a bad deal.
But there are some caveats.
What
@goldwater58 said about the glove box!!! Only, keep the key blade with you.
Make sure they do the front prop shaft too. These are harder to get to and often overlooked.
If you currently have OEM wipers do not let them install the Toyota-branded "sightline" wipers that most dealers stock. You want OEM parts only, part numbers 85222-42110 and 85222-53071. If you are still on OE parts you can get the rubber refills for less than $10 per wiper.
I've also heard good things about Duggy's.