For a small bottler like the Smoky Lake, there's nothing wrong with a steam pan, the biggest trade off would just be having to refill the tray. I have one of their earlier versions of the finish/filter/bottling pans with a steam pan. Thankfully it looks like they have since added a port to be able to add water without removing the pan. I warped my steam pan the first time I used it because I left it over the propane too long and unknowingly ran it dry. I still use that as my finishing pan without the steam pan under it. The thing that I always hated with it was that it was hard to keep my temperature steady with it on propane. At the time I bought it they didn't have the option of the electric element. 2-3 years ago I moved up to a 29 gallon water jacketed bottler with dual 230V heating elements, and I would never go back to bottling over propane. I have a mark on the knob that corresponds to my preferred bottling temp and I can have my wife go out and turn on the bottler a couple hours before I get home from work and when I get home my syrup is nearly up to temp but not a degree over without ever touching it again, and it doesn't usually fluctuate even 1/2 degree from start to finish even if it takes me a few hours bottling 29 gallons by myself. I add some permeate to the water jacket a couple times throughout the season and other than that there's nothing to it. So, I don't have any reason to steer you away from a steam pan style for a bottler that size, but I highly recommend going with electric.
2013 4 on buckets, kitchen stove/grill
2014 40 on buckets, Mason 2x3
2015 150-200 gravity, 20x24 sugarhouse 75% complete
2016 Can't remember but still on gravity
2017 70 sap sacks, ~315 on vacuum
2018 60 sap sacks, 445 on vacuum
Leader Oil-Fired 3 X 8 w/steamaway
Deer Run RO 250gph
Kubota M7040 and a very helpful wife