Welcome and you should be good to go. I would not bother pulling the clutch cover unless something leads you to believe it needs inspecting. This is a great forum to learn all you ever need to know about these machines.
Yeah I have also looked into thermo shield with the adhesive backing for under the seat as well as around the fuel tank. Kinda thought that was odd also having the tank exposed right next to the engine.I once owned a 800, great power and sold it because I wanted a crew. The only complaint I had was the level of heat which come up from the engine through the seat and that can be resolved relatively easy, assuming you might experience the same in yours. The engine is essentially under the seat and many have created heat shields to deflect heat away, see http://www.prcforum.com/forum/17-ranger-discussions/35943-2011-ranger-800-seat-heat-issue-5.html
I used heat shields on both (under the seat and around the tank) plus used a 3000 inline blower iMarine - "Your Marine Pump and Water Systems Specialists" ? Attwood Water Resistant Turbo 3000 In-Line Blowers 3" to push air back with a simple toggle switch located on the dash and was satisfied with the set up. I ended up keeping the 3000 inline blower and mounted in my 570 crew to just move air across the CVT and push air.Yeah I have also looked into thermo shield with the adhesive backing for under the seat as well as around the fuel tank. Kinda thought that was odd also having the tank exposed right next to the engine.