[Big Kev-O]

The best way to do this without buying tools is to use a compression fitting & hose barb fitting. $15 at the local hardware store is cheap insurance on a long trip. If the OP had a flare tool he would not be asking this question.

Yes you can jury rig/flare out the hard pipe and slide the hose over it and may be good for 10 years. OR it may leak slowly and fail hundreds of miles away from home in a blizzard(my luck).