Q1: I used intersect to create my layer, visually I didn't notice a difference. However; in the attribute table I did notice there were two records with intersect, compared to four with union.
Q2: I used the erase tool for my results, because I needed to subtract the overlapping areas to eliminate them from being candidates for possible camp sites.
Q3: I ended up with 81 features, my largest area was 775,304 sq. meters, and my smallest was 748.11 sq. meters.
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