Seems like a goofy time indeed! I think the only problem you might find is that your boss threats, especially Bigfoot, are going to go down waaay faster than you might be expecting. FOMO has a side effect in the Havoc engine of the equipment getting saved for boss fights and then suddenly one of your characters pulls out all the stops, rolls 20+ dice ( my record in an EtR session was 35) and now can one shot every threat and objective in one round. Boss fights should ideally last at least 1 round, if not two+ and the thing to remember is that your players have a better than 50% chance on average (with 6s counting as 2) but the variance is huge. I like adding ridiculous layers of challenge to a boss threat and then making side objectives to remove the challenge. That way as the GM you can scale how much you remove or keep based on how the turns are going to give the fight narrative weight.
Over all though this seems super fun.