Take the bikes!! Some great riding 15-20 miles east of Bend---East Fort Rock is the name of one area---my wife and I have been there twice, we're beginning and novice riders respectively--loved the mix of what was there, and good camping too. The area is beautiful if you enjoy everything out of doors. Hopefully won't be too dry for you, but there are some places in tthe woods, out in the open, whoops--they seem to have it all. Stop in a local place in Bend, they can give you some maps and info----Bend is not that big, so won't be hard to find a place to give info.
Have fun.