We strongly recommend that you rent a bike as part of your tour package (which more than 99% of our clients do, most of them with great satisfaction).
Transporting a bike can be expensive and a hassle, especially if you have a bike box you need to have transported.
Equally important, if something goes wrong with the rental bike, the local tour company is responsible for fixing or replacing it. Don't risk missing days of your tour waiting for a replacement part!