Be forewarned if you want to do disaster recover plans the right way they'll be more to it then you might imagine.
Put a budget to the making of that plan, both in man hours and in resources cost. Like are you planning to spend eight man hours writing your plan or 500 man hours. You might say '500 man hours!, no way!.' Powwowing with 10 employees to start and then talking about disaster at meetings add to man hours fast. If you are midsize or large company, then when managers take time to get info ready for you for the plan that you requested then that eats from the time budget also. All just for the writting a disaster recovery plan.
Some things to do for disaster; make an inventory and cost replacement of all your assets you need to make your clients happy. On items with warranties, guarantees, support contracts, licensing, make sure you have all manufacture, distributor, vendor contact info and current status of accounts with them. Think if a server drowns will you be able to replace that 10,000 dollar 10 year old server in a day? Will the vendor be happy to hear you want a replacement item right away (or is your account outstanding). You might say, oh I'll by a NEW machine off the shelf! Oh? will your old software WORK on that machine. Will a custom software app that needs a hardware key allow a new machine to run the custom app?
Have building evacuation plans, usually with walkie talkies assigned to personnel and their backup personnel.
For certain company types, for proper disaster recovery, make sure you've spoken with banks for emergency financing.
Check your medical plan support; ie 50% of staff is out from sickness cause by issue at building, like mold or dangerous fumes. Once I ran across 11% of staff out from getting very sick from DUCK POO (which had a nasty virus).
Have backup site for staff, have travel costs figured and budgeted to have staff go to backup site. Once one company planned their backup site to be just over one hour south of main site. WOW those mileage costs for employees (and sometimes travel time (hourly wage) costs for some staff) can add up in one week! Union people might have contracts for time traveled to offsite. Plan for people just not being able to travel to offsite and account for temps costs to replace them until main site is backup. You might ask "Who would do that?" Well pregnant employees for one as they may need to be near their doctor or hospital.
One odd disaster recovery thing is legal stuff. Like if your board of trustees gets charged for illegal stuff (like having a bunch of computers with illegally installed operating systems). When some company associates are unavailable for what ever reason certain authorities (read as signatures if you like) may become unaccessible.
The way you sell a disaster recovery plan to "those that want it" are:
First and foremost; Staff and client health protection (from disaster), such as evacuation procedures, call-chains/trees (ie who calls who, who is authorized to tell whom what), health issues of people
Second, financial and cash asset protections (ie info like access to your copyrights, patents, contracts (info), client account balances, lines of credit with financiers) without which recover from disaster is really hampered from lack of cash flow.
Certain "Information" assets fall between financial and asset categories.
Details on asset recovery of buildings, electronic equipment, paper assets like all those filing cabinets. (I bet a lot of companies decide to go paperless when they start on a disaster recovery plan)
There's more. But this post is long enough.