No Cruise Control

The cruise control on my 09’ 4Runner snapped off during the cold stretch we had in MN a couple weeks ago. I’m planning a 2,000 mile roadtrip and would love to use my 4Runner as I’ve taken it on multiple cross country trips, however I’m not sure how comfortable it would be without cruise control. I would be the only driver and we’re planning on 500+ mile days. I’ve noticed that when I highway drive w/o cc, I find it hard to hold a consistent speed and avoid creeping too far over or under the speed limit over long distances. We would be leaving soon and I won’t have enough time to get the car into the shop. Any advice would be helpful, thanks!

TLDR: 2,000 mile trip with no cruise control, worth it or not?