I have put together a little list of items that will be great to include for your trips whether it is for a day, weekend or for the full week.
Above is an adorable peasant dress from Mod Cloth. I like this one because of the color tones feel like the ocean or summer. It is easy to get on and off and wear your bathing suit under it. And if you don't actually make it into the water, it is flowy enough to keep the heat at bay. Also, I cannot get enough of the embroidery details on anything. This can be found www.modcloth.com "run florest run dress" for $72.99.
Here is a fabulous white floppy beach hat. This will keep the sun away and saving your precious face from horrible sun burn. Also, it will fit nicely in your beach tote or overnight bag. Since it is white, it will look great with any summer outfit you put together. This is provided by fellow Etsy seller and can be found at http://www.etsy.com/listing/49375688/white-eyelet-floppy-hat-by-mademoiselle and only costs $27.00
I love this shop on Etsy. They have interesting patterns on everyday items. They include totes, lunch bags and greeting cards to name a few. I thought that this bike image represents the summer getaways more than anything. I think that you can pile in your needed items to pull together a great afternoon at the sun and surf. You can find this on Etsy at The Craft Pantry: http://www.etsy.com/listing/48763619/tote-recycled-cotton-canvas-handmade
Bathing Suit: One piece or two it is nice to see a little piece peek out from underneath your summer dress. Again, you don't have to break the bank in getting a bathing suit. What I like about Target's selections is that you can mix and match or get several for a low reasonable price.