Before children, DH and I both paid the same amount into a joint account to cover all bills and expenses. Whatever was left was ours to keep, we earned roughly the same.
Post children, we both pay our salaries into a joint account (DH earns over 3x what I do). Everything comes out of the joint account, including all personal spending. If either of us are spending more than £50 or so, we'll let the other know.
We have various savings pots and save throughout the year for Christmas, holidays, car maintenance, etc. We still have access to personal accounts so at Christmas time, I transfer money to our personal accounts to buy gifts for each other.
I manage the accounts and savings and if we're running low on cash, I simply let DH know not to spend anything.
In your situation, I would be inclined to say that both of you pay your salaries into a joint account with an equal amount of personal spending transferred to your own accounts. You leave enough in the joint account to cover your bills and groceries and then transfer the remainder into your joint savings pots to go towards your wedding, rainy day fund, etc... Obviously this requires a huge amount of trust from both of you but if you're planning on marrying this man, then hopefully you do trust him!