What part of Owasso are you in? I am familiar with the area.
Anyhow, gravel would probably be your cheapest bet. Depending on your specifics, you would be looking at;
100' long x 16' wide x 0.5' deep = 800 / 27 = ~30cy x 2#/tn = ~60 tons
Depending on the quarry, you can get aggregates for around $8/ton. Haul rates will vary. Sometimes you pay more for stone that is closer, but less in haul. I'd figure $7/ton to be safe. That gives you $15/ton for material & haul. I think you can beat that number. But approximately $900 in gravel delivered.
You may want to contact...
Greenhill Materials (located @ 46th St N)....918-274-6560
Anchor Stone....918-438-1060
Dolese / Mohawk Concrete....918-376-2252
Keep in mind, you may need less tons if you do less than 6" deep. If you ran concrete, I'd do 4" which is only ~20cy. Prices range around $100/cy depending on PSI, haul, quantity, etc. So roughly $2,000 for materials only delivered on-site. GCC/Midco, Dolese, Rainbow and Twin Cities should be considered.
With both the gravel and concrete, you could do 2' strips for the tires only and save money. With the gravel, rent a Bobcat and place yourself. If I did the strips, I might form up and use a 2x4 to screed the concrete. Won't be perfect, but serve the purpose. On the larger slab I'd find one of the home builder concrete guys to do the labor only. Just find one that can speak fairly good English. No disrespect meant...just a reality.
Speaking of tire strips...you could put a sand layer down and do those landscape blocks from Lowes or Home Depot. They might move around on you some though.
http://www.lowes.com/Search=landsca...0051&N=0&newSearch=true&Ntt=landscape+pavers#!
Whatever you decide, I can't see it being DRASTICALLY different in cost if that is your primary driver. The concrete drive will be most expensive upfront but probably provide the most life. Having friends with gravel driveways, they redo them every so often. Also I work with a guy that has asphalt drive. Cost and looks was his driver. However, the ice storms and blading his drive had him replacing sooner than he wanted. They all have cons and pros. Just find what works for you.