From personal experience... Depending on the courts she will probably just get a slap on the hand and someone say "you can't do that." Unfortunately since she IS the custodial parent and she IS the mother the courts will go easy on her. Our judicial system still seams to think the Mother is the best parent for the job.
If this does go beyond a police report: Keep copies of EVERYTHING. You will need a very strong case to prove her unfit as a parent if you seek to change custody. Sorry but camping in the winter will not work in your favor. There is absolutely nothing wrong with camping in 30 degree weather if one is properly outfitted for it. The Girl Scouts actually offer a badge for it!
Best of luck!
D.
SAHM of two: 19(by choice since he was 7yrs old) and 6(by birth). Baker/Owner of LittleSnowflakes. Married to my best friend for almost 13 years.