about the suitcase/checked luggage......already covered, by above. now the vegas part....here's what i found on clark county and vegas laws....
Nevada 202.320 & 202.350 & 202.355 Y ? Knife carry is legal but very little definition of what is legal. See NV Law.
Clark Co. NV.
ordinance...12.04.180, legal to carry < 3" cannot be concealed weapon of any description, including a knife with a blade of three inches
Henderson, NV
ordinance 8.98.010, legal to carry <3" blade length cannot be concealed
Las Vegas, NV.
definition more than an ordinance... 10.70.010, legal to carry <3" blade length cannot be concealed
ordinance 10.70.020 forbids loitering with a weapon concealed, while ordinance 10.70.030 prohibits fighting or disorderly while in possession.
N. Las Vegas, NV
ordinance 9.32.040, legal to carry <3" blade length cannot be concealed
so the mini-grip is under 3" i believe? likely legal to carry clipped or hidden in pocket, unless they have changed the ordinances from what i found online? always call the cities you will be in police and counties sheriff and state police and get their legal definitions. laws change constantly, better safe than sorry.
as usual be careful as casino security might be looking for clipped knives of any length and it's private property so you could be booted out. also police aren't always up to speed on every knife law, so if you get in a drunk stupor and cops show up? having a pocket knife of any kind is just going to make your life that much harder. so be smart, and if you go partying and drinking leave the knife in the suitcase, locked with your tsa approved lock.

at the hotel.
as usual i am not a lawyer so take what i write for what it is, not legal help or advice.