yes you can. From the old city it takes about an hour.

We went after heavy rain and it was beautiful. It was still raining heavy showers the day we went there.

It varies on where you are going from in Chiang Mai (we were near the University which is ignored in guide books but is a beautiful place to ride bicycles) and if they can convince you into going to another stop where they get a cut if you buy anything. We paid 500 (it may have been 600) THB for two and just to go to the waterfalls and back. Plus entrance fee. The food and drink there at the park entrance is not bad - not great but not bad. Bring water, of course.

We set up a tour of four countries with Niki at Odyssey Tours out of China. We went to Thailand, Laos. Vietnam, and Cambodia. There were three of us. We were picked up at the airport, by a guide and a driver in a small van. We were shown around during the day, and dropped back at the hotel around 5:00 every night. We had to pay for dinners, but no other meals. Larry

a round trip rate with a taxi meter ( they are not expensive ) best to go to airport taxi desk for taxi. Price around 1000 to 1500 bht return as a guide. Don't forget best to book for the day or half day and have them take you to some of the other places of interest. This is your best bet. Plus the safest, not that there is a safety issue. Red car will take you there, negotiate a rate and book for the day, your hotel can help you there. Any other queries let me know, we are resident in Chiang Mai.