Griffiths’ side will be promoted if they win all four, with Sunday’s match against Hemel Stags being the first of three at home.
Griffiths said: “It wasn’t pretty at times (against Gateshead last week), but we’ve now got three of our last four games at home.”
Perkins said: “A couple of weeks ago we recognised that we’d put ourselves in a good position for a top four finish and we’re aiming for that, but we’ve got three really tough games ahead.
“If we don’t play with the intensity needed then there’s every chance of results going against us. We’ve got to be on the ball and not take anything for granted.
“Crusaders are probably the best supported team at home. I’m sure Clive will have them on the right track as they look to claw back first position. There’s a lot at stake for both teams.”