My way of getting eggs on Fjordur is using an Andrew and killing all the drakes or avoid them walk right next to the nest dismount grab egg get back of and if you are quick enough you will not take Radiation damage you will start to get it but not fully get it. Hope this helps P.S These are the most awesome Dinos in Ark besides Wyverns, Magmasaurs, Managarmr, and Deinonychus,

Your Rockdrake Lover