hey brad!
i think the v8 juice would be ok. ive had it when flaring pretty bad and the only problem it gave me sometimes was it made my acid reflux act up, but that might not be one of your problems.
the general problem with fruits and vegs IMO is the INsoluble fiber, which is all the roughage of the stuff that doesnt digest well. but the juices are soluble fiber, so it passes thru easily.
thats how i unerstand it at least.
it might be really good for you to get some vitamins and minerals that way! in my opin juices are a good way to get the goodness of fresh stuff with out the problem that the actual fruits and vegs can pose.
dont take my word on this totally lol, just my thoughts and opinions.
good luck! its good to see you here!