Hokkaido on my second visit to Japan

Hi guys, I went to Japan 2 years ago visited Osaka, Kyoto and Tokyo.

My wife and I plan on visiting Hokkaido this year May for 2 weeks. Any ideas on stuff we can do or travel tips for Hokkaido that I can add to the 2 weeks? Don’t think we plan on renting a car but taking the bus/train.

Also how does Hokkaido compare to Osaka, Tokyo and Kyoto?

by DZLords