Pretty! How did you transport all of your flowers to your venue?
They were delivered to my house (about 4 hours from the venue - there weren't any florists we could have used locally other than a grocery store within 50 miles - so this was pretty much necessity)... I left them closed in the box they came in until the absolute LAST second down in my basement. Then I put them with the base wraps (its like a piece of sponge with a plastic wrap) still on into mid-size storage bins (like those Rubbermaid/Sterlite type ones) to transport. I just loaded those into the back of the car. It was a rather tight and unenjoyable four hour drive with H & the kids to say the least LOL.. The nice thing is I didn't have to worry about having enough buckets when it came time to cut the bases and put them initially into water (at about 4AM the day of the party while in the hotel room), It made a quick load back up to drive to the hall. The stem cutters the flowers came with sucked, so it's worth spending some money on a decent pair so you can cut through them quicker (I got some Fiscars ones from the Lawn & Garden Dept.)
The one thing I botched was the size of the vases I needed. I bought some vases thinking they'd be large enough only to discover the opening was about half the size I needed (think cupping your hand into a capitol "C" shape - is about the size the arrangements were, the vase openings were unfortunately meant for an "o" shape...) so added over hour of time I didn't have to go find/purchase some new vases.
At the end of the day, I'm so glad I purchased them already arranged because it saved so much time over if I'd have purchased the individual blooms and assembled that many arrangements myself even though I've got the basics here at the house to do so. It still took a ton of time just cutting all the stems, moving stuff, water and the packets into the vases, moving around to individual tables, etc. It wasn't an option for us to not DIY given that we had no florists nearby to the venue. I figured "oh, it'll only take an hour at the hall to put everything together" - it took me about five hours by the time all was said and done to do 100% of the setup. If I could have ordered FTD or a local florist and been assured that a florist would have delivered the blooms I wanted (Roses & Callas) I'd have been time ahead, but that wasn't an option... Time is the big thing, you can't be late to your wedding because you're arranging flowers, so really take into account what kind of time you've got available even if you order them already arranged.
Hydrangeas are incredibly tempermental! Roses are easy...
One thing to be aware of if you arrange them yourself is that it's a super messy process. You may not want to do it in your hotel room because of the cleanup...