Wow a jump like that could end you up in trouble. The correction bit is like a level "10" if you will a snaffel is about a level "1-2". If your horse is responding just fine to the snaffel then I would stick with it!!! A snaffel bit its pretty much the basic starting bit. Has ur horse ever had a correction bit in his mouth? If not this can be a major shock to the horse. Is your snaffel bit plain or twisted????? If it is plain and you would feel more comfortable in something a little more "controlling", if you will, then I would suggest a slow twist snaffel. There is a fast twist snaffel too but the decision is soley up to you. Be careful in your decisions.
But, you don't ever want to try out a new bit on the trail. Use it on them in the arena to get them used to the pressure in different places. Also, it is a huge jump from a snaffle to a correction. If you want to try your horse in a shanked bit, I suggest either something similar to the link above or just a simple grazing bit with 6 inch shanks. Only use these if you are training your horse to neck rein and he already has the idea.