Awwww. You are not a crappy snake owner. Just take him with you if you are that worried. I take mine to the pet store. Sometimes that last an hour. Lol.
Although he really should have something regulating his temps. Even if you are home all the time, you still need to sleep. Temp spikes can occur at random times, and some have even melted a tub in a short period of time.
You might even look in the yellow pages for a pet sitter. Maybe a professional with watch him for you (I bet they charge out the rear, but it's worth a shot).
Good luck! I hope it works out for you :) Relax, it's a vacation for you!