Yosemite - PLEASE HELP ASAP

Sup

Im from the Bay, and ill be going to Yosemite Park for a few days. I obviously plan on toking, but I was wondering:
1-Is it safe to bring shit n toke at national parks?
2-Do they have dogs running around looking for MJ?
3-Do they check with dogs or at all when you enter the park?
4-Do lots of people do it over there?

Im very concerned about this, as I will be going with the whole family, aunt, cousins etc. too and I dont want them rangers to check and find my shit and be like: "Allright guys, you caught me, I smoke pot LOL" in front of my family.

Any help, details, heads-up are appreciated.
Thanks

k i guess that was too dumb of a question