As I recall, $35 for DU and $25 DW for basic memberships. Space them a month or 2 a part and it'd make it a bit easier on the pocket book if $ is tight.
DU is more about habitat acquistion and many non hunters also support them and DW a bit more about research/biology and more of a vocal supporter of hunters. Both are needed IMO
Also DU CA and DW CA, are bit different being they have diffrerent laws of what non profits can say and do up in Canada.