My class was with Bruce as well...the highlight of the class. I'll mirror what JT has said, conservation easements are highly risky, require a lot more due diligence, and are not just another feather in your cap. Although the fees are much higher, it will take you all your billable hours just to get it right...at least for the first 10-20. My last easement was 300+ pages (60 pages of which was the baseline study, another 20+ was the actual easement agreement).
Like anything in our business, having a great database is essential to being profitable. However one thing that will not be taught in that class, but something a lot more neccessary than even the class is having a great relationship with the different easement holders. If all you are doing is AG work, than DNR, USDA...etc. is usally a pretty good source. However if you are doing scenic and/or open land that group is a lot wider...for every area that has those types of lands there is usually three to four Gov't agencies that hold easements, and another five to six conservancy groups that do as well. I had one in northern Michigan that not only had the DNR holding easements, but the Township holding TDRs, and eight nature conservancy groups holding them as well. Positive in all that is I had market extracted resales of properties subject to easements...bad news it was stretched out between 10 different groups.
One thing I learned from the Easement Class was to get your client to sign affidavits stating any known or perceived "quid pro quo" arrangements, ownership of all family owned parcels within a 50 mile radius, and intentions of all plans for non donated land. I then put a copy of those sworn statements in the appraisal...take that IRS.