After replacinig the camshaft position sensor, it was recommended that I change the t/chain hydro gasket kit. This sounds like something that should be done along with a t-belt/water pump replacement. It's been 35,000 miles since my last t-belt change. If I pick one up, would it be relatively easy to replace myself?

P.S. I also should replace my valve cover gasket. Perhaps this hydro gasket kit should be done at the same time as the valve cover gasket?? I don't think I want to get into taking off the valve cover myself. Spark plugs, ignition rotor, air filters is all I've done myself.