You can always keep it as fumarate for example and convert to freebase before smoking. Converting is very easy, just mix with sodium carb and bit of water, let dry and pull with some alcohol or acetone and evap (onto herbs if you want).
I would NOT smoke a salt form of bufotenine. As a general guideline, freebases are for smoking. Bufotenine is already harsh enough as it is, and in general smoking salt forms can be from toxic/irritant (as is the case of fumarate salts which can form maleic anhydride) or at best less effective than freebase.