Not sure a steering dampener is going to help much hitting whoops, it's is designed to prevent the quick deflection of your handlebars, I always found they are most effective in rock, where your bars are bouncing side to side hitting them. If you don't have your sag set, that is where you should certainly start, also the right springs for your weight, front and back will cost less then a dampener and be a far better investment. Sending the forks and shock out for a proper tuning by a suspension shop will do wonders for you. In the NJ area you have a few shops with great experience with the type of riding in the area.. I had mine done by Solid Performance in Downingtown Pa. I have been nothing but 100% pleased with the outcome. There is WER (Works Enduro Rider) and a few others too.
So glad you enjoyed yourself.... I had the first section in the second half. Down the blacktop, down the sandy sand road through the 1st check and the next 3+ miles after it.