I’ve had a lot of luck with a full ghillie suit without a flyer sneak in and grab eggs sneak out haven’t been aggro’d on once since I started getting the eggs,I also found I can bypass needing wyvern milk with a decent daedon full of meat with its passive healing ability activated,doing this I’ve been able to retrieve and raise 1-3 wyverns at once depending on how many eggs I can gather in one trip