I"d probably take into account the UTG limp from someone who"s not been doing this regularly, the tight player"s raise of an UTG limp, and the bubble situation. Surely the bubble situation means the tight player"s range is even tighter?
I wouldn"t 3 bet in this spot if you"re planning to fold to a shove. I think folding is probably way too tight. I would flat call preflop. You"re deep enough so this isnt a complete spew. The UTG player will probably come along for the extra 6k. If he re-pops you can safely fold. If he doesnt you can play the hand safely 3 ways in position
If you end up having to fold to a cbet on the flop when you miss, so be it. You"ve preserved your big stack, and you"ve preserved the bubble situation for alittle while longer, meaning you can use your maintained stack to steal chips for some time yet