If you'll fish only sporadically, artificial lures should do the job. But if your trip will focus on fishing, odds are you'll make the sacrifice to carry bait. Transporting minnows is a nuisance. Should you deem it necessary to use them, I suggest you carry a small, collapsible minnow trap or a short length of seine to capture minnows along the way. A handful of dry dog food makes good minnow trap bait.
Minnows work well in spring and fall, but there are better choices during the summer.
Nightcrawlers catch walleyes and are easy transport. The only real hassle with them is keeping them cool. Crawlers cook quickly in the sun, and really should be iced down during the summer. There is a better choice. Fortunately for us, walleyes love leeches.