It will depend on the steepness of the beach. We have put our C Dory 22 both bow and stern on the beach a number of times. The disadvantage of the bow first, is that you have to either go thru the foredeck hatch or walk around--hard if you have dogs.
Stern too we put out a bow anchor and then run the boat back until the stern is just on the beach--with the motor all of the way up. We put out two anchors, for the stern--one for each side. We then either stepped of, if the bank/rock etc was appropiate, or we put our "pet step" ashore from the motor well and walked off, keeping the feet dry.
The issues I see with gravel is that there will be some abrasion of the bottom, and that you may have some light pounding on the surface. Where we did this there was minimal tidal range. If you are doing this in Alaksa, you will have to be sure that you don't either get the boat stuck on the beach, or that you will return to find the boat is 50 feet from the bank as the tide came in.
I would consider what we did with our RIB in Alaska--since it was too big to carry up and down the beach. We set the anchor about 100 feet offshore--and had a block on the end of 50 feet of anchor line or chain.
We then had a line which went thru the block, from the bow eye and back to the aft deck cleat. When the anchor was set, we backed the boat to the beach and held bow to the swell, after the passangers got off, a person took the bow line to the beach. This line was at least 200 feet long, and the bitter end was tied to the cleat at the stern of the boat. After all were off, the boat's bow was pulled off an adequate distance so that if the tide went out, the boat would still be floating--and if the tide came in, the aft loop of line was taken to a tree, boulder, sand screw, and secured, so that the boat could be pulled back in when you were ready to reboard the boat. We tried this several times with the C Dory and it worked as well as it did with the RIB.
Hopefully I have described the technique adequately--sort of like the old fashioned clothesline with a pulley on the tree in the yard.