Good morning Angie,
Some things that I have done in the past to promote boot camp/personal training is setting up a booth in your local Vitamin Shoppe (or other health/fitness store), promoting your services.
Social media might be one of the easiest was to promote using Instagram or Face Book.
You can promote the boot camp at local public schools (to teachers) or other local businesses.
You can try to partner with the local parks and rec department offering boot camp. This can also be helpful in the case of bad weather (can offer an indoor location in case of rain).
In terms of pricing, I find that selling a monthly package is easier and less stressful then doing a per session price. You can offer 4 session (1x a weekend for $65/month) and “unlimited” for $110 per month.
Hope this helps, good luck!