You should be able to deduct mileage from your regular office to the remote site, CONUS per diem rates unless on an expense account, campground fees, and other normal expenses related to being gone from your normal home/office.
disclaimer: I am not a tax professional nor did I stay at a Holiday Inn Express last night.
Craig and Carol
1997 34' Excella 1000
1970 27' Overlander, International
2009 Ford F150 5.4L
ProPride hitch with 1400# bars
Past President Southeastern Camping Unit (12)