well first how far are you traveling? if you're about haflway to your 3k mark for oil you should probably consider changing it, i took a roadtrip from worcester,ma to toronto, ca and didn't do it and i paid dearly. my car didn't forgive me for weeks.
check all the hoses and the other fluids (transmission, clutch (if you're manual), brake fluid...blinker fluid
jk. also check your battery) It's not so much maintenence as making sure "hey, is my car going to fall apart if i drive it long distances?"
so in review:
1) oil if need be
4) hoses in the engine
its not a bad idea to bring a gas container and a few quarts of each fluid in a case in the trunk. never know what's going to happen.
welcome to the forum!
edit: i just read what you said about oil, i'm a retard and didn't read the full post. sorry!