Campbell (22) and his Motherwell mates have won their last two league games against St Johnstone and Aberdeen to go up to eighth in the Premiership table, although they suffered disappointment on Thursday night when losing 3-0 to Hapoel Be'er Sheva in Israel to crash out of the Europa League.
Rangers, meanwhile, impressed the same evening with a 4-0 away thumping of Dutch cracks Willem II.
"Whenever you play the top two it's always difficult," Campbell told the Times and Speaker.
"You have to be on your best form and really well organised and I'm sure we will be.
"I'm sure when Sunday comes round we'll be recovered, set up and organised and ready to try and put a performance in."
Motherwell last beat Rangers in the 2017-2018 campaign, when Louis Moult's double secured a 2-0 success in a Betfred Cup semi-final encounter at Hampden.
But you have to go way back to Boxing Day 2002 for the Steelmen's last league win over Rangers, when James McFadden scored in a 1-0 Fir Park victory.
To see how Motherwell fare against Rangers today (kick-off 12 noon), follow our live Twitter updates at @Cgoldthorp_MT