Yep...Also I took my heads to a machine shop to have them pressure tested (in case there were any microscopic cracks), checked for warping, had a valve job done, and had them install the valve guide seals (they come with the Fel Pro kit). I think that was $100 or $150.
If you don't want to get that far into the hole, you can take a chance and skip the above. In that case, I figure the gasket is $100, the bolts are $100, and $100 to replace the motor oil and coolant (which are contaminated and must be discarded), plus incidentals like RTV, spark plugs if they look fouled, special sockets if you need them (on the OHV, the head bolts use a $30 big Torx socket), etc...
A torque wrench and breaker bar are must-haves too.