I did Vancouver to Fargo, ND on my old 550 via the highway that runs west from Sedro Wolley. It doesn't take any maintenance beyond the usual you should be doing. Do not ride the interstate; that's torture. Yes, you can ride it in one day but don't, you'll be sorry. You will also find it easier if you don't try to ride extra fast. The product I use for my throttle hand is called a Throttle Rocker.
What gear are you taking with you. I use a tank bag, saddle bags and I have a Cdn. army sleeping bag carrier for the bag, the air mattress and a garbage bag of dirty clothing. I devote the tank bag to wet/cold weather gear. The bike gets one saddle bag for oil, chain lube and a sock holding tools. The other saddle bag is for my clothing and toiletries. I use a couple of cargo nets to hold the bag and small tent behind the seat. Don't put too much there because it'll tend to push you forward.
Keep changing positions cause your butt will go dead, don't let your shoulders and neck freeze up on you so stop when you need to and calculate your fuel and you'll not run out. Lube the chain at the end of the day with the bike running in gear up on the center stand and give it lots. You want the chain hot and it will clean and burn off the solvent and leave the wax.
The 550 is adequate but not near as good as my GS1000 for a highway trip. If you are going to do many long trips and can motel along the way the 550 should meet all your needs. Remember, it's not a rocket, don't try to make light speed.