seed
Call your local private golf course superintendent. He will welcome your call and steer you in the right direction for your specific needs in your area.
With grass seed, you get what you pay for. Go cheap and you will get poor turf. Also ask him about endophyte treated seed, these are designed to handle insects and disease without chemcals thus enhancing your turf. discuss with him what type of mowing equipment (reel vs rotary)you have or will be using and differt heights of cut, this also has an influence on your seed choice. You also want to get his suggestions on fertilizer requirments for seed establishment and the best time of year to seed in your area, this has a big impact on turf density and fill in.
He may also order your seed for you, thus ensuring a good blend. He probably can get a special blend of seeds he feels would be best for you.
Give him a call, he will be professional, helpful and may end up liking a ride in your rv for the service.