Again you don't look at it from a business perspective, My wedding tend to be long drives to do rehearsal requires another night in a hotel room plus having to buy all my meals and a greatly increased time away from my family, all of that time and expenses are valuable to me, If I can make $750 on that same night and not incur those expenses, why should I charge less to the bride for the rehearsal and loose income lets see if I can make it more clear to you.
Rehearsal gig Friday night
Charge $750
3 hour drive requires hotel stay -100
2- 3 meal that have to be bought -35
time away from family - priceless
total profit Friday night $615
Saturday Wedding $1250
Hotel -100
Weekend profit $1765
Local Gig Friday night $750
Saturday wedding 1250
hotel -100
weekend total $1900 plus I got to spend a lot more time with my wife and kids
the second is a much better scenario for me
You will also notice I didn't put in cost for fuel mileage depreciation and what ever those are the cost of doing the gig,