35 gallons is not going to be enough fuel for that boat.
I would suggest making the crossing the 1st time with a "buddy boat".
Do you have a drift sock or have a couple 5 gallon buckets and some dock line?
If you're broke down mid channel sock or bucket will keep your bow into the wind until VA shows up, thus keeping water from coming over the stern or side rails, also makes it much more comfortable while waiting for assistance.
Do you have a good VHF radio & antenna?
Do you have a back up hand held VHF?
Do you have a chartplotter?
Can you read a compass so that you know your heading going and returning from Cat incase you lose your electronics?
Do you have a hand held GPS for back up?
Does the boat have at least one 1100 GPH bilge pump?
Do you have a back up hand operated bilge pump?
Do you have a full set of Coast Guard flares, whistle, horn?
Do you have flashlights or glowsticks incase you're broke down in the dark?
Do you have a small tool box with a variety of hand tools, elect tape, duct tape, zip ties, fuses....etc?
Do you have a detailed map of Catalina Island and local Southern California inshore buoy's / hazards?
Do you have a good anchor, at least 150 ft of rope & chain?
Do you have a back up anchor?
Is the boat's battery in good operating condition?
When was the last time the boats raw water pump impellor changed?
Are the belts and hoses in excellent condition (free of visual cracks)?
What condition on the trailer are the springs, tires, wheel bearing, hitch, brakes, bunks, winch, & lights in?
This is a good site:
Southern California Marine Weather Forecast | BUOYWEATHER.COM
This is a good site:
National Weather Service - NWS Los Angeles/Oxnard
Do you have a responsible person to give your "float plan" information to prior to departure, and can they make the call to the authorities (VA and-or CG) if you're much later than expected (3-4 hrs)
All things listed above are what we consider prior to leaving the harbor, no matter what our destination may be.
One last thing............
35 gallons is not going to be enough fuel for that boat.