START and TAXI ---- ?? lbs
TAKE-OFF AND CLIMB to 1000' (28 C) ---- 30 lbs
TRIP (using 65% tq for an economic cruise and assuming 144 TAS and 665 PPH) ---- 1000 lbs
10% CONTINGENCY ---- 100 lbs
RESERVE (you mentioned 30 minutes; 30 minutes at holding speed) ---- 265 lbs
1400 lbs should do the trick.
Fuel calculations in cruise should show you landing with about 365 lbs.
Certainly don't fancy myself a guru of anything other than procrastination so let me know if you guys see anything wrong with this.