Great inputs all... and they have helped me make more decisions than just taking a lens to the beach. I have put the 100-300 and 28-105 in their own lens case and will stash them in the trunk to have available. The 100-300 to get the eagle shot and the 28-105 in case I want some walk around reach beyond 55mm. Tibbitts nailed it in that I've always been on the fence with the 28-105. It's OK, but always leaves me wanting more. I will likely put it up for sale very soon - along with some other manual focus glass. What I really need is the Pentax 18-135 and get rid of some of the stray glass taking up space in my closet.
Since I'll have the 18-55 (kit) and two primes in the bag I'll probably end up using the DA L 35mm f/2.4 most of the time (since I enjoy it so much). It will be nice to have the 18mm at my disposal in town though. One advantage to the kit lens is the hood has the piece that slides out to gain access to the circular polarizer. The Tamron 28-105 hood doesn't have that feature. The other thing that sucks about the Tamron is there is no profile for it in LR4. I like using lenses with a profile as it speeds up post processing.
Like peterjcb, I prefer the smaller lenses in crowds, but trying to blend in with an orange camera can be a waste of time.
Since I'm taking the 100-300 (a Tamron 100-300 f/5-6.3) I'll take the tripod.