Cross-country trips are easy on the car. Things can fail, but I'd say they're more likely to fail in local, stop-and-go, driving.
If you have driven the car for some distance after all the fixes (say a thousand miles) and everything is fine, no warning lights, no runny noises, I'd say you're fine. But if there's something you've been worrying about, or been told by a shop that you should consider fixing, it's a good idea to do that before you leave.
Things I would double-check before leaving:
- Wiper blades. They should work perfectly without skipping or streaking. You will need them working properly for this trip. Plus washer reservoir should be full, spare jug with you, and spray pattern needs to be properly set up. (I would also carefully clean the inside of all the windows before leaving with something like Windex.)
- All tires hold pressure. NO leaks, no matter how slow. Check the spare tire pressure too. Make sure the lug bolts are torqued to spec, NOT airgunned on by a shop that promises "we use torque sticks ha ha ha". Properly torqued lug bolts can be removed with the tools in the car (you have the tools, right?). Improperly torqued, you need to call a service truck.
- You do have winter tires on, right? Considering it's winter, I would be leery of doing this on all-seasons, unless you take a very southerly route.
- No fluid leaks. If something does leak or the level drops, you want to be sure that it doesn't start dropping really quickly when you're in the middle of the Nevada desert.
- Headlights need to be properly adjusted. If halogen, I'd grab a spare set of bulbs. You don't want to be driving on one headlight in unfamiliar territory after dark.
- Stereo works properly. You'll probably be listening a lot.
Good luch. Road trips are a lot of fun. I've done long trips with crappy vehicles and I'm still here. :cheesy: Especially in a convoy with other cars, it's going to be fine.
By the way, I typically
don't carry a lot of tools/spares with me. Sure, a socket/wrench set and a toolbox with screwdrivers and pliers and stuff. Hopefully I never have to pull it out. The point is, if everything is running fine and you know the car, nothing minor should go wrong. If something major happens, well you don't want to be doing, say, an oil pan drop or fuel pump change by the side of the highway anyway. (Although, if it isn't too cold, a roadside fuel pump change isn't infeasible on a 9-5.)