carleton

krispenhartung, you are trying to turn an apple into an orange.

If you want to control your resistance, simply take a cheap mag trainer with you.

EDIT:

Also, you can control the resistance with the mag trainer (even go with no resistance) and a mag trainer is no more effort than a the Omnium. In fact, it's easier than the Omnium as you don't have to remove a wheel, simply lock the rear wheel into the base. With the Omnium, you have to remove the front wheel.

I'd consider the Omnium as a travel-only last resort.