I checked the regulations for Maryland and there is a 30 pound minimum draw weight for bowhunting deer. You're clear on the legal issue. Within the parameters you laid out, your bow is capable of killing a deer, but I feel it's right on the raw edge. Make sure you can hit exactly where you aim at 15 yards and hold out for that perfect shot opportunity.
Forget vanes, completely. You 'can' set up with an extremely high nock point to get them to shoot halfway decent off the shelf, but that arrangement will rob you of speed and energy, and you'll never get decent arrow flight. You simply cannot afford to lose energy with your light draw bow.
I've only been shooting for 49 years and I have those 'off days.' PLENTY of them.
