Farm & Fleet generally has a Mobil 1 sale, in various viscosity grades, at some time of the year, and possibly coupled with a rebate. This makes for a very good $$$ deal!
Many guys are running Mystik JT- 4 2-cycle Full Synthetic, or Amsoil Interceptor. Mystik JT 4 2-Cycle Full Synthetic is around $28 @ Farm&Fleet. When on sale, with the rebate, it's around $20. Very good oil, top of the line specs, cold flow, and viscosity levels.
I use the right size, and load rated trailer tires for the load, plus trailer weight, and gear loaded in the trailer. I then will adjust tire pressure, up, or down, in order to get the proper wear. This has always worked well for us.
Elf, perhaps they were there because that's the only time they had available to execise their teams? Is a multi use trail available to them only at certain times? I'm not arguing your point, as it's very well taken. Where I'm coming from on this, is there are way too many snowmobilers, I'm sad...