Entry is not "difficult", but I'd say it's a wee bit more than "moderate". There are barbed wire fences everywhere....concertina wire too. More importantly, there are "Unexploded Ordinance" warning signs everywhere. You really have to be careful here. You can't park on any of the nearby roads... BLM says no cars are allowed there, but oddly enough, you can drive in there (just not legally...strange)...just don't get caught by the DOI Rangers who patrol the area frequently.