Also a note... I think it would depend upon how mild your case of Crohn's is. The meds you listed are designed as maintenance meds. The theory being that taking them is required to help. That said, stopping Remicade for long periods of time can build an immunity to the med. Your body can develop antibodies and then it can stop working (or have an adverse reaction). For some people, once the body stops responding to one TNF, others are less effective. Basically, I wouldn't mess with maintenance if something is working.
I get remicade episodically (which is basically stopping and starting - I only have it when symptoms return and the time inbetween is maintained with methotrexate) I had 2 years remission from my first infusion, 3 years from the second, 6 months from the third and fingers crossed the fourth will give me more.
Most doctors advise against episodic use now but back in the day when they were first dishing it out you only got it episodically when your symptoms returned because of the cost so luckily they still agree to treat me like that, being on a maintenace like methotrexate is supposed to decrease the chances of building an immunity to the remicade.