Agreed about the vet thing. Despite the health guarantee, it's a smart thing anyway to get introduced to the vet and get on a regular exam schedule.
Sure, you can try a bath though. It's actually a decent time to do it, while your cat is a kitten. You will learn one of two things:
1. Your cat surprisingly loves water (many bengals do!)
or
2.. Your cat hates water
If the former, it could be a fun thing going forward for both of you. If the water is at a "nice" temperature, and you are gentle, and don't treat it like a punishment, it could be a cool thing. If the latter, that may be the last bath you're ever able to administer
Mine are all in the latter category unfortunately. Now that they have determined that they hate it, there is no way I could pull that off again unless I was ok with two bloody stumps where my arms used to be (and mine are females... I imagine it would be even more problematic with a male which often get about twice the size). There usually isn't a reason to give a cat a bath anyway unless there is a skunk involved or something unusual like that. I recall reading something about important oils on their coat being lost and such, so unless there is a compelling reason to do it (like your cat loving it) it probably shouldn't be done. There are other ways to treat fleas and other pests.
One other thing to consider with regard to the first vet visit: if you have any thoughts of getting pet health insurance, now is the time to do it (prior to the first exam). There is this small window of opportunity now before any symptoms or problems or abnormalities get "on the books" where you can get insured for no prior conditions at all. Just a thought...