We all make choices in life - I can respect your choice to smoke (though please don't do it near me), but you have to respect someone's choice to not accept smokers.
I'd ask yourself "why do you want to do Fundies?".
There are alternatives. A good Intro to Tech class may be an option - though I would turn you away from mine as I don't teach smokers either. Mostly for my own health and well being, though there is also an element of not wanting to accept the risks.
You may find that the UTD Essentials class an alternative - I beleive that the UTD stance is "no smoking around diving activities", though don't quote me on that as I am not that familiar with the UTD standards.