I just finished my fast last week, it was a 35 day fast. I also have a LOT of eliminations. I usually had between 10-15 eliminations a day so I know where you are coming from (and going to... :)
Anyway, I do have some suggestions. If vaseline works for you, that is a good thing. A friend of mine who is a doctor and a parent suggested I use balmex. That is for diaper rash and that works pretty well also.
I've heard pepe say he likes to use the baby wipes to clean things up. I would recommend the non-scented ones that have things like aloe in them.
Your idea of washing with water is a very good one. You might want to plan taking your shower after your SWF (Salt-Water-Flush)
and all the eliminations that occur from that. That way your are starting out the day fresh and clean. It's important to keep your bumm clean and dry and plain water is really a good way to do it.
From what I've read, having lots of eliminations is a good sign, certainly a lot better than the tons of people who have very few eliminations... After about a couple of weeks on the fast, I started to get 1 inch
by 1/4 inch
of ropy looking stuff which was probably mucoid plaque. It wasn't the big long 2 foot long ropes that you see pictures of but at least it was coming out...
hope this helps.